0001628280-23-035304 | 10-Q | XBRL Viewer

Comprehensive Loss (Detail) - USD ($)	3 Months Ended				9 Months Ended
Comprehensive Loss (Detail) - USD ($)	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Equity [Abstract]
Other Comprehensive Income (Loss), Net of Tax	$ 38,148			$ 0	$ 206,869	$ 0
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	$ 204,931	$ 102,847	$ 65,874

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Equity Rollforward Statement - USD ($)	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Preferred Stock Convertible Preferred Stock [Member]	Common Stock [Member]	AOCI Attributable to Parent
Stockholders' Equity Attributable to Parent	$ 23,215,786		$ 222,378,374	$ (199,163,257)	$ 1	$ 668
Shares, Outstanding					200	6,650,480
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	37,632		37,632
Stock Issued During Period, Shares, New Issues		292,500
Stock Issued During Period, Value, New Issues	1,943,052	$ 29	1,943,023
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ (3)	3
Stock Issued During Period, Shares, Restricted Stock Award, Gross		1,759
Net Income (Loss) Attributable to Parent	(958,562)			(958,562)
Net Income (Loss) Attributable to Parent	(3,724,739)
Stockholders' Equity Attributable to Parent	24,237,908		224,359,026	(200,121,819)	$ 1	$ 700
Shares, Outstanding					200	6,944,739
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	109,340		109,340
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		50,213
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	215,417	$ 5	215,412
Stock Issued During Period, Shares, Employee Stock Purchase Plans		2,503
Stock Issued During Period, Value, Employee Stock Purchase Plan	7,829		7,829
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ (7)	(7)
Stock Issued During Period, Shares, Restricted Stock Award, Gross		3,120
Net Income (Loss) Attributable to Parent	(1,159,923)			(1,159,923)
Stockholders' Equity Attributable to Parent	23,410,571		224,691,600	(201,281,742)	$ 1	$ 712
Shares, Outstanding					200	7,000,575
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	161,951		161,951
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ (202,008)	$ (1)	(1)
Stock Issued During Period, Shares, Restricted Stock Award, Gross	57,972	16,578
Net Income (Loss) Attributable to Parent	$ (1,606,254)			(1,606,254)
Stockholders' Equity Attributable to Parent	21,966,268		224,853,550	(202,887,996)	$ 1	$ 713
Shares, Outstanding					200	7,017,153
Stockholders' Equity Attributable to Parent	23,355,687		226,934,775	(203,579,866)	$ 1	$ 777
Shares, Outstanding					200	7,675,682
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	165,361		165,361
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ (1)	1
Stock Issued During Period, Shares, Restricted Stock Award, Gross		19,512
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	65,874						$ 65,874
Net Income (Loss) Attributable to Parent	(1,574,174)			(1,574,174)
Net Income (Loss) Attributable to Parent	(4,879,940)
Stockholders' Equity Attributable to Parent	22,012,748		227,100,135	(205,154,040)	$ 1	$ 778	65,874
Shares, Outstanding					200	7,695,194
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	132,745		132,745
Stock Issued During Period, Shares, New Issues		725,291
Stock Issued During Period, Value, New Issues	691,405	$ 73	691,332
Stock Issued During Period, Shares, Employee Stock Purchase Plans		10,526
Stock Issued During Period, Value, Employee Stock Purchase Plan	8,715	$ 1	8,714
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ (6)	6
Stock Issued During Period, Shares, Restricted Stock Award, Gross		72,121
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	102,847						102,847
Net Income (Loss) Attributable to Parent	(1,537,029)			(1,537,029)
Stockholders' Equity Attributable to Parent	21,411,431		227,932,920	(206,691,069)	$ 1	$ 858	168,721
Shares, Outstanding					200	8,503,132
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	221,268		221,268
Stock Issued During Period, Shares, New Issues		1,470
Stock Issued During Period, Value, New Issues	1,426		1,426
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ (1)	1
Stock Issued During Period, Shares, Restricted Stock Award, Gross		22,561
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	204,931						204,931
Net Income (Loss) Attributable to Parent	(1,768,737)			(1,768,737)
Stockholders' Equity Attributable to Parent	$ 19,903,536		$ 228,155,613	$ (208,459,806)	$ 1	$ 859	$ 206,869
Shares, Outstanding					200	8,527,163

Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
Statements of Cash Flows (Unaudited) - USD ($)	Sep. 30, 2023	Sep. 30, 2022
Statement of Cash Flows [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (4,879,940)	$ (3,724,739)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	30,957	39,170
Stock-based compensation	519,374	308,923
CompensationObligationSettlement	0	26,019
Inventory Write-down	63,420	0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	0	(6,875)
Investment Income, Net, Amortization of Discount and Premium	135,293	133,278
Debt Securities, Available-for-Sale, Realized Gain	(166,783)	0
Changes in operating assets and liabilities:
Accounts receivable	32,390	(391,641)
Inventories	(115,042)	(350,686)
Prepaid expenses and other current and long-term assets	(197,404)	(383,310)
Accounts payable	(142,608)	255,343
Accrued expenses and compensation	356,562	540,902
Net Cash Provided by (Used in) Operating Activities	(4,634,367)	(3,806,422)
Payments to Acquire Held-to-maturity Securities	0	(18,921,376)
Payments to Acquire Debt Securities, Available-for-Sale	(22,898,470)	0
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities	17,000,000	0
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale	7,095,000	0
Cash flows from investing activities:
Purchases of fixed assets	(138,176)	(23,182)
Net Cash Provided by (Used in) Investing Activities	1,058,354	(18,944,558)
Cash flows from financing activities:
Net proceeds from issuance of stock and warrants	701,546	1,950,881
Net Cash Provided by (Used in) Financing Activities	701,546	1,950,881
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(2,874,467)	(20,800,099)
Cash and cash equivalents, end of period	1,460,553
Supplemental disclosure of cash flow information:
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,460,553	$ 1,772,005

Statement of Comprehensive Income (Statement) - USD ($)	3 Months Ended		9 Months Ended
Statement of Comprehensive Income (Statement) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income (Loss) Attributable to Parent	$ (1,768,737)	$ (1,606,254)	$ (4,879,940)	$ (3,724,739)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax	204,931	0	373,652	0
Other Comprehensive Income Realized Gain Adjustment	(166,783)		(166,783)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (1,730,589)	$ (1,606,254)	$ (4,673,071)	$ (3,724,739)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

Business and Basis of Presentation	9 Months Ended
Business and Basis of Presentation	Sep. 30, 2023
Accounting Policies [Abstract]
Business and Basis of Presentation	Business and Basis of Presentation Our Business-An Overview NeuroMetrix, Inc. (the "Company" or "NeuroMetrix") develops and commercializes health care products that utilize non-invasive neurostimulation. Revenues are derived from the sale of medical devices and after-market consumable products and accessories. The Company’s products are sold in the United States and select overseas markets. They are cleared by the U.S. Food and Drug Administration ("FDA") and regulators in foreign jurisdictions where appropriate. The Company has two primary products. DPNCheck® is a point-of-care test for diabetic peripheral neuropathy, which is the most common long-term complication of Type 2 diabetes. Quell is an app-enabled, wearable device for lower extremity chronic pain and for the symptoms of fibromyalgia. The Company held cash, cash equivalents and securities totaling $17.6 million as of September 30, 2023. The Company believes that its present balance of cash resources and securities coupled with cash inflows from product sales will enable the Company to fund its operations for at least the next twelve months from the date of issuance of the financial statements. Actual cash requirements could differ from management's projections for many reasons, including changes the Company may make to its business strategy, commercial challenges, regulatory developments, changes to research and development programs, supply chain issues, staffing challenges and other items affecting the Company's projected uses of cash. Unaudited Interim Financial Statements The accompanying unaudited financial statements as of September 30, 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2022 has been derived from the audited balance sheet as of December 31, 2022 included in the Company's Form 10-K referenced below and does not include all disclosures required by GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission, (the "SEC"), on March 22, 2023 (File No. 001-33351). Prior period reclassifications We classify money market funds within cash and cash equivalents. Money market funds in the amount of $81,751 which were reported within held-to-maturity ("HTM") securities at December 31, 2022 have been reclassified into cash and cash equivalents to conform with the current presentation. Revenues Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company typically has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained. Accounts receivable are recorded at the amount the Company expects to collect, net of the allowance for doubtful accounts receivable. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, recent customer communications and, if appropriate, assessment of the future credit losses for receivables with similar characteristics. Individual customer balances which are over 60 days past due are reviewed individually for collectability. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for doubtful accounts was $25,000 as of September 30, 2023 and December 31, 2022. In the quarters ended September 30, 2023 and 2022, two customers accounted for 28% and 13% of total revenues during 2023, and two customers accounted for 22% and 10% of total revenues during 2022. In the nine-month periods ended September 30, 2023 and 2022, two customers accounted for 26% and 10% of revenues during 2023 and one customer accounted for 34% of revenues during 2022. As of September 30, 2023, three customers represented 32%, 26% and 12% of receivables and two customers represented 17% and 14% of receivables as of December 31, 2022. Cash and Cash Equivalents Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities. Securities The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either HTM or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of September 30, 2023, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less. HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive income loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive income (loss). For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of September 30, 2023. Fair Value The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5). Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates. Recent Accounting Pronouncements Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements. Recently adopted accounting pronouncement In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. The guidance in ASU 2016-13 replaces the incurred loss impairment methodology under current GAAP. The new impairment requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other instruments. It applies to all entities. For trade receivables, loans and HTM debt securities, entities are required to estimate lifetime expected credit losses. Trading and AFS debt securities are required to be recorded at fair value. SEC small reporting companies were required to adopt this new guidance in fiscal years beginning on or after December 15, 2022. The Company adopted this guidance on a prospective basis as of January 1, 2023 and had no material impact on the financial statements.

Net Loss Per Common Share (Tables)

9 Months Ended

Sep. 30, 2023

Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	Quarters Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net loss applicable to common stockholders	$	(1,768,737)	$	(1,606,254)	$	(4,879,940)	$	(3,724,739)



Weighted average number of common shares outstanding, basic and dilutive	8,520,025		7,011,438		8,034,711		6,962,732

Net loss per common share applicable to common stockholders, basic and diluted	$	(0.21)	$	(0.23)	$	(0.61)	$	(0.53)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	September 30,
		2023	2022
Options		520,299	525,468
Unvested restricted stock awards		61,292	106,550
Unvested restricted stock units		301,647	207,233
Convertible preferred stock		62	62
Total		883,300	839,313

Accrued Expenses

9 Months Ended

Sep. 30, 2023

Payables and Accruals [Abstract]

Accrued Expenses

Accrued Expenses and Compensation

Accrued expenses and compensation consist of the following:


	September 30, 2023		December 31, 2022
Professional services	$	335,201	$	155,000
Compensation	329,559		249,224
Clinical	$	43,524	$	—
Warranty	10,300		16,700
Sales tax	128,986		131,621
Other	38,931		37,394
	$	886,501	$	589,939

Inventories (Detail) - USD ($)	9 Months Ended
Inventories (Detail) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Inventory [Line Items]
Purchased components	$ 1,245,623		$ 982,129
Finished goods	420,986		632,858
Inventories	1,666,609		$ 1,614,987
Inventory Write-down	$ 63,420	$ 0

Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Sep. 30, 2023	Oct. 25, 2023
Document Information [Line Items]
Entity Central Index Key	0001289850
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		8,591,374
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Type	10-Q
Entity Current Reporting Status	Yes
Entity Small Business	true
Entity Interactive Data Current	Yes
Security Exchange Name	NASDAQ
Trading Symbol	NURO
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-33351
Entity Registrant Name	NEUROMETRIX, INC.
Entity Incorporation, State or Country Code	DE
Entity Address, Postal Zip Code	01801
Local Phone Number	890-9989
Entity Filer Category	Non-accelerated Filer
Entity Tax Identification Number	04-3308180
Entity Address, Address Line One	4B Gill Street
Entity Address, City or Town	Woburn
Entity Address, State or Province	MA
City Area Code	781
Title of 12(b) Security	Common Stock, $0.0001 par value per share

Leases Leases (Details) - USD ($)		3 Months Ended			6 Months Ended	9 Months Ended
Leases Leases (Details) - USD ($)	Jun. 01, 2018	Sep. 30, 2023	Sep. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Operating Leased Assets [Line Items]
Operating Lease, Weighted Average Discount Rate, Percent		15.00%				15.00%
Operating Lease, Weighted Average Remaining Lease Term		2 years				2 years
Operating Lease, Expense		$ 49,232	$ 46,102			$ 147,696	$ 116,959
Operating Lease, Right-of-Use Asset		281,891				281,891		$ 370,609
Rent Expense Reduction				$ 60,000
Sublease Income					$ 22,795
Lessee, Operating Lease, Liability, to be Paid, Year One		41,446				41,446
Lessee, Operating Lease, Liability, to be Paid, Year Three		165,785				165,785
Lessee, Operating Lease, Liability, to be Paid, Year Four		117,431				117,431
Lessee, Operating Lease, Liability, to be Paid		324,662				324,662
Operating Lease Discount		53,401				53,401
Operating Lease, Liability, Current		148,391				148,391		148,391
Operating Lease, Liability, Noncurrent		$ 122,870				$ 122,870		$ 207,516
Rent Expense Reduction				$ 60,000
Sublease Income					$ 22,795
Woburn Lease [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Renewal Term	5 years
Woburn Lease [Member] \| MonthlyRent [Member]
Operating Leased Assets [Line Items]
Operating Lease, Payments	$ 13,846

Statement of Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Schedule of Stock by Class [Table Text Block]

Preferred stock and convertible preferred stock consist of the following:


	September 30, 2023		December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at September 30, 2023 and December 31, 2022; no shares issued and outstanding at September 30, 2023 and December 31, 2022	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at September 30, 2023 and December 31, 2022; 200 shares issued and outstanding at September 30, 2023 and December 31, 2022	$	1	$	1

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

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+ Details

Net Loss Per Common Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	883,300	839,313
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	62	62
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	520,299	525,468
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	61,292	106,550
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total antidilutive securities excluded from the computation of earnings per share (in shares)	301,647	207,233

Comprehensive Loss	9 Months Ended
Comprehensive Loss	Sep. 30, 2023
Equity [Abstract]
Comprehensive Loss	Comprehensive Loss For the quarter and nine months ended September 30, 2023, the Company had comprehensive income of 38,148 and 206,869, respectively for net unrealized gains on AFS securities, in addition to net loss in the statement of operations. There were no components of comprehensive income (loss) for the quarter and nine months ended September 30, 2022 other than net loss itself.

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended									3 Months Ended						9 Months Ended
	Aug. 31, 2023	Jul. 31, 2023	Jun. 30, 2023	May 31, 2023	Oct. 19, 2022	Jun. 30, 2022	May 31, 2022	Apr. 30, 2022	Jan. 31, 2022	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Class of Stock [Line Items]
Stock Issued During Period, Value, Employee Stock Purchase Plan			$ 8,715								$ 8,715			$ 7,829
Net proceeds from issuance of stock and warrants																$ 701,546	$ 1,950,881
Common stock, par value (in dollars per share)										$ 0.0001						$ 0.0001		$ 0.0001
Stock Issued During Period, Shares, Restricted Stock Award, Gross	172,660	24,500			12,500		161,764						57,972
Stock Issued During Period, Value, Restricted Stock Award, Gross	$ 240,000	$ 22,883		$ 12,625			$ 550,000						$ 202,008
Stock Issued During Period, Value, New Issues										$ 1,426	$ 691,405				$ 1,943,052
Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, Employee Stock Purchase Plans			10,526			2,503					10,526			2,503
Stock Issued During Period, Value, Employee Stock Purchase Plan						$ 7,829					$ 1
Stock Issued During Period, Shares, New Issues										1,470	725,291				292,500
Stock Issued During Period, Shares, Restricted Stock Award, Gross								76,000	20,000	22,561	72,121	19,512	16,578	3,120	1,759
Stock Issued During Period, Value, Restricted Stock Award, Gross								$ 326,000	$ 104,200	$ 1	$ 6	$ 1	$ 1	$ 7	$ 3
Stock Issued During Period, Value, New Issues											$ 73				$ 29
Restricted Stock
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number										61,292						61,292		96,250
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number										301,647						301,647		194,731
Management Incentive Compensation \| Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues								50,213
Stock Issued During Period, Value, New Issues								$ 215,417
At The Market Offering Program [Member] \| Common Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues		1,470	725,291						292,500
Proceeds from Issuance of Common Stock		$ 1,426	$ 691,405						$ 1,943,052

Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Professional services	$ 335,201	$ 155,000
Accrued Salaries, Current	329,559	249,224
Accrued Consulting Current	43,524	0
Warranty reserve	10,300	16,700
Other	38,931	37,394
Sales and Excise Tax Payable, Current	128,986	131,621
Accrued expenses	$ 886,501	$ 589,939

Net Loss Per Common Share Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net Income (Loss) Attributable to Parent	$ (1,768,737)	$ (1,537,029)	$ (1,574,174)	$ (1,606,254)	$ (1,159,923)	$ (958,562)	$ (4,879,940)	$ (3,724,739)
Weighted Average Number of Shares Outstanding, Basic	8,520,025			7,011,438			8,034,711	6,962,732
Weighted Average Number of Shares Outstanding, Diluted	8,520,025			7,011,438			8,034,711	6,962,732
Earnings Per Share, Diluted	$ (0.21)			$ (0.23)			$ (0.61)	$ (0.53)
Earnings Per Share, Basic	$ (0.21)			$ (0.23)			$ (0.61)	$ (0.53)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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-Paragraph 2
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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Label	Element	Value
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 4,335,020
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 22,572,104

Inventories (Tables)

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories consist of the following:


	September 30, 2023		December 31, 2022
Purchased components	$	1,245,623	$	982,129

Finished goods	420,986		632,858
	$	1,666,609	$	1,614,987

Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2023

Payables and Accruals [Abstract]

Schedule of Accrued Expenses

Accrued expenses and compensation consist of the following:


	September 30, 2023		December 31, 2022
Professional services	$	335,201	$	155,000
Compensation	329,559		249,224
Clinical	$	43,524	$	—
Warranty	10,300		16,700
Sales tax	128,986		131,621
Other	38,931		37,394
	$	886,501	$	589,939

Net Loss Per Common Share

9 Months Ended

Sep. 30, 2023

Earnings Per Share [Abstract]

Net Loss Per Common Share

Basic and dilutive net loss per common share were as follows:


	Quarters Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net loss applicable to common stockholders	$	(1,768,737)	$	(1,606,254)	$	(4,879,940)	$	(3,724,739)



Weighted average number of common shares outstanding, basic and dilutive	8,520,025		7,011,438		8,034,711		6,962,732

Net loss per common share applicable to common stockholders, basic and diluted	$	(0.21)	$	(0.23)	$	(0.61)	$	(0.53)

Shares underlying the following securities were excluded from the calculation of diluted net loss per common share because their effect was anti-dilutive for each of the periods presented:


	September 30,
		2023	2022
Options		520,299	525,468
Unvested restricted stock awards		61,292	106,550
Unvested restricted stock units		301,647	207,233
Convertible preferred stock		62	62
Total		883,300	839,313

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]


	Quarters Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Net loss applicable to common stockholders	$	(1,768,737)	$	(1,606,254)	$	(4,879,940)	$	(3,724,739)



Weighted average number of common shares outstanding, basic and dilutive	8,520,025		7,011,438		8,034,711		6,962,732

Net loss per common share applicable to common stockholders, basic and diluted	$	(0.21)	$	(0.23)	$	(0.61)	$	(0.53)

Business and Basis of Presentation (Policies)	9 Months Ended
Business and Basis of Presentation (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
Unaudited Interim Financial Statements	Unaudited Interim Financial Statements The accompanying unaudited financial statements as of September 30, 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2022 has been derived from the audited balance sheet as of December 31, 2022 included in the Company's Form 10-K referenced below and does not include all disclosures required by GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission, (the "SEC"), on March 22, 2023 (File No. 001-33351). Prior period reclassifications We classify money market funds within cash and cash equivalents. Money market funds in the amount of $81,751 which were reported within held-to-maturity ("HTM") securities at December 31, 2022 have been reclassified into cash and cash equivalents to conform with the current presentation.
Revenues	Revenues Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company typically has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained. Accounts receivable are recorded at the amount the Company expects to collect, net of the allowance for doubtful accounts receivable. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, recent customer communications and, if appropriate, assessment of the future credit losses for receivables with similar characteristics. Individual customer balances which are over 60 days past due are reviewed individually for collectability. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for doubtful accounts was $25,000 as of September 30, 2023 and December 31, 2022. In the quarters ended September 30, 2023 and 2022, two customers accounted for 28% and 13% of total revenues during 2023, and two customers accounted for 22% and 10% of total revenues during 2022. In the nine-month periods ended September 30, 2023 and 2022, two customers accounted for 26% and 10% of revenues during 2023 and one customer accounted for 34% of revenues during 2022. As of September 30, 2023, three customers represented 32%, 26% and 12% of receivables and two customers represented 17% and 14% of receivables as of December 31, 2022.
Cash and Cash Equivalents, Policy	Cash and Cash Equivalents Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities.
Marketable Securities, Policy	Securities The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either HTM or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of September 30, 2023, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less. HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive income loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive income (loss). For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of September 30, 2023.
Fair Value Measurement, Policy	Fair Value The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5).
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates.
New Accounting Pronouncements, Policy	Recent Accounting Pronouncements Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements. Recently adopted accounting pronouncement In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. The guidance in ASU 2016-13 replaces the incurred loss impairment methodology under current GAAP. The new impairment requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other instruments. It applies to all entities. For trade receivables, loans and HTM debt securities, entities are required to estimate lifetime expected credit losses. Trading and AFS debt securities are required to be recorded at fair value. SEC small reporting companies were required to adopt this new guidance in fiscal years beginning on or after December 15, 2022. The Company adopted this guidance on a prospective basis as of January 1, 2023 and had no material impact on the financial statements.

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis


	September 30, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	827,002	$	827,002	$	—	$	—
U.S. government bonds	4,447,930		4,447,930		—		—
Commercial paper	11,729,192		—		11,729,192		—
Total	$	17,004,124	$	5,274,932	$	11,729,192	$	—


	December 31, 2022
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,551,027	$	1,551,027	$	—	$	—
Total	$	1,551,027	$	1,551,027	$	—	$	—

Investments, Debt and Equity Securities (Details) - HTM - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Schedule of Held-to-Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	$ 0	$ 16,864,707
Debt Securities, Held-to-maturity, Fair Value		16,794,874
Debt Securities, Held-to-Maturity, Allowance for Credit Loss	$ 0
US Government Agencies Debt Securities
Schedule of Held-to-Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss		3,457,651
Debt Securities, Held-to-maturity, Fair Value		3,456,580
Corporate Debt Securities
Schedule of Held-to-Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss		4,011,569
Debt Securities, Held-to-maturity, Fair Value		3,950,380
Commercial Paper
Schedule of Held-to-Maturity Securities [Line Items]
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss		9,395,487
Debt Securities, Held-to-maturity, Fair Value		$ 9,387,914

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Leases Leases (Notes)

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Lessee, Operating Leases [Text Block]

Operating Leases

The Company's lease on its Woburn, Massachusetts corporate office and manufacturing facility extends through September 2025 with a monthly base rent of $13,846 and a 5-year extension option. The Company's lease on its former corporate office in Waltham, Massachusetts (the "Waltham Lease") expired in February 2022. In the first quarter of 2022, a $60,000 reduction in rent expense was recorded upon return of the facility to the lessor. The letter of credit issued by a bank in favor of the Waltham facility was released. For the six months ended June 30, 2022, the Company recorded sublet income on the Waltham Lease totaling $22,795 within operating expenses on the Company's Statement of Operations.

Future minimum lease payments under this non-cancellable operating lease as of September 30, 2023 are as follows:






2023	41,446
2024	165,785
2025	117,431
Total minimum lease payments	$	324,662

Discount rate, 15%	$	53,401
Lease obligation, current portion	148,391
Lease obligation, net of current portion	122,870
	$	324,662

Total recorded rent expense was $49,232 and $46,102, for the quarters ended September 30, 2023 and 2022, respectively. Total recorded rent expense was $147,696 and $116,959 for the nine months ended September 30, 2023 and 2022, respectively. The Company records rent expense on its facility lease on a straight-line basis over the lease term. The remaining operating lease term was two years as of September 30, 2023.

Balance Sheets - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 1,460,553	$ 4,335,020
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss	0	16,864,707
Debt Securities, Available-for-Sale	16,177,122	0
Accounts receivable, net	614,381	646,771
Inventories	1,666,609	1,614,987
Prepaid expenses and other current assets	786,978	645,502
Total current assets	20,705,643	24,106,987
Fixed assets, net	272,838	165,619
Operating Lease, Right-of-Use Asset	281,891	370,609
Other Assets, Noncurrent	26,400	26,400
Total assets	21,286,772	24,669,615
Current liabilities:
Accounts payable	225,474	368,082
Accrued expenses and compensation	886,501	589,939
Operating Lease, Liability, Current	148,391	148,391
Total current liabilities	1,260,366	1,106,412
Operating Lease, Liability, Noncurrent	122,870	207,516
Total liabilities	1,383,236	1,313,928
Commitments and contingencies
Stockholders’ equity:
Common Stock, Value, Issued	859	777
Additional paid-in capital	228,155,613	226,934,775
Accumulated Other Comprehensive Income (Loss), Net of Tax	206,869	0
Accumulated deficit	(208,459,806)	(203,579,866)
Total stockholders’ equity	19,903,536	23,355,687
Total liabilities and stockholders’ equity	$ 21,286,772	$ 24,669,615
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares, Issued	8,588,455	7,771,938
Common Stock, Shares, Outstanding	8,588,455	7,771,938
Convertible preferred stock
Stockholders’ equity:
Preferred stock	$ 1	$ 1
Preferred Non-Convertible Stock
Stockholders’ equity:
Preferred stock	$ 0	$ 0

Business and Basis of Presentation (Detail) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Business and Basis of Presentation (Detail) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 30, 2023	Mar. 31, 2023	Jan. 01, 2023	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Organization And Basis Of Presentation [Line Items]
Accounts receivable, net	$ 614,381		$ 614,381		$ 646,771
Net proceeds from issuance of stock and warrants			701,546	$ 1,950,881
Accumulated deficit	208,459,806		208,459,806		203,579,866
Cash and cash equivalents	1,460,553		1,460,553		4,335,020
Prepaid expenses and other current assets	(786,978)		(786,978)		(645,502)
Assets, Current	(20,705,643)		(20,705,643)		(24,106,987)
Liabilities, Current	(1,260,366)		(1,260,366)		(1,106,412)
Operating Lease, Liability, Noncurrent	(122,870)		(122,870)		(207,516)
Stockholders' Equity Attributable to Parent	19,903,536	$ 21,966,268	19,903,536	21,966,268	23,355,687	$ 21,411,431	$ 22,012,748		$ 23,410,571	$ 24,237,908	$ 23,215,786
Cost of revenues	421,382	693,571	1,484,240	1,888,566
Gross Profit	781,782	$ 1,274,432	3,099,439	$ 4,520,129
Operating Lease, Right-of-Use Asset	(281,891)		(281,891)		(370,609)
Assets	(21,286,772)		(21,286,772)		(24,669,615)
Accrued Liabilities, Current	(886,501)		(886,501)		(589,939)
Liabilities	(1,383,236)		(1,383,236)		(1,313,928)
Allowance for doubtful accounts	25,000		25,000		25,000
Cash, Cash Equivalents, and Short-term Investments	17,600,000		17,600,000
Debt Securities, Held-to-maturity, Fair Value					$ 16,794,874
Accounting Standards Update 2016-13
Organization And Basis Of Presentation [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]								true
Change in Accounting Principle, Accounting Standards Update, Adoption Date								Jan. 01, 2023
From Held To Maturity Securities \| Money Market Funds
Organization And Basis Of Presentation [Line Items]
Cash and cash equivalents	$ 81,751		$ 81,751
Customer One \| Revenue \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	28.00%	22.00%	26.00%	34.00%
Customer One \| Accounts Receivable \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage			32.00%		17.00%
Customer Two \| Revenue \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage	13.00%	10.00%	10.00%
Customer Two \| Accounts Receivable \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage			26.00%		14.00%
Customer Three \| Accounts Receivable \| Customer Concentration Risk
Organization And Basis Of Presentation [Line Items]
Concentration risk, percentage			12.00%

Fair Value Measurements

9 Months Ended

Sep. 30, 2023

Fair Value Disclosures [Abstract]

Fair Value Measurements

The following tables set forth the Company’s financial instruments that were measured at fair value:


	September 30, 2023
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	827,002	$	827,002	$	—	$	—
U.S. government bonds	4,447,930		4,447,930		—		—
Commercial paper	11,729,192		—		11,729,192		—
Total	$	17,004,124	$	5,274,932	$	11,729,192	$	—


	December 31, 2022
	Total		Level 1		Level 2		Level 3
Assets:
Money market funds	$	1,551,027	$	1,551,027	$	—	$	—
Total	$	1,551,027	$	1,551,027	$	—	$	—

The Company's accounts receivable, accounts payable, and accrued expenses are valued at cost which approximates fair value.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Stockholders' Equity

9 Months Ended

Sep. 30, 2023

Equity [Abstract]

Stockholders' Equity

Stockholders’ Equity

Preferred stock and convertible preferred stock consist of the following:


	September 30, 2023		December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at September 30, 2023 and December 31, 2022; no shares issued and outstanding at September 30, 2023 and December 31, 2022	$	—	$	—
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at September 30, 2023 and December 31, 2022; 200 shares issued and outstanding at September 30, 2023 and December 31, 2022	$	1	$	1

2023 Equity Activity

In May 2023, the Company issued 12,500 restricted stock units under its 2022 Equity Incentive Plan with a value of $12,625.

In June 2023, the Company issued 725,291 shares of its common stock, under an at-the-market ("ATM") program for net proceeds of $691,405 and issued 10,526 shares of fully vested common stock with a value of $8,715 pursuant to the Company's Employee Stock Purchase Plan.

In July 2023, the Company issued 1,470 shares of its common stock, under ATM program for net proceeds of $1,426 and issued 24,500 restricted stock units under its 2004 Stock Option Plan with a value of $22,883.

In August 2023, the Company issued 172,660 restricted stock units with a value of $240,000 as long term incentives ("LTI") to its directors under its 2022 Equity Incentive Plan.

As of September 30, 2023, the Company has 61,292 restricted stock awards and 301,647 restricted stock units that remain unvested. At December 31, 2022, the Company had 96,250 restricted stock awards and 194,731 restricted stock units that were unvested.

2022 Equity Activity

In January 2022, the Company issued 292,500 shares of common stock under an ATM equity offering program with net proceeds of $1,943,052 and issued 20,000 restricted stock awards under its 2004 Stock Option Plan with a value of $104,200.

In April 2022, the Company issued 76,000 shares of restricted common stock under its 2022 Equity Incentive Plan with a value of $326,000 to employees as LTI and issued 50,213 shares of fully vested common stock with a value of $215,417 in settlement of management incentive compensation.

In May 2022, the Company issued 161,764 restricted stock units with a value of $550,000 as LTI to its management and directors under its 2022 Equity Incentive Plan.

In June 2022, the Company issued 2,503 shares of fully vested common stock with a value of $7,829 pursuant to the Company's Employee Stock Purchase Plan.

For the quarter ended September 30, 2022, the Company issued 57,972 restricted stock units with a value of $202,008 under its 2022 Equity Incentive Plan.

- Definition

The entire disclosure for equity.

+ References

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+ Details

Preferred Stock and Convertible Preferred Stock (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Preferred Non-Convertible Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Value of preferred stock issued	$ 0	$ 0
Preferred stock, shares outstanding (in shares)	0	0
Series B Preferred Stock \| Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	147,000	147,000
Preferred stock, shares issued (in shares)	200	200
Value of preferred stock issued	$ 1	$ 1
Preferred stock, shares outstanding (in shares)	200	200

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Assets
Debt Securities, Available-for-Sale	$ 16,177,122	$ 0
Assets, Fair Value Disclosure	17,004,124	1,551,027
Money Market Funds
Assets
Money market funds	827,002	1,551,027
US Government Agencies Debt Securities
Assets
Debt Securities, Available-for-Sale	4,447,930
Commercial Paper
Assets
Debt Securities, Available-for-Sale	11,729,192
Level 1
Assets
Assets, Fair Value Disclosure	5,274,932	1,551,027
Level 1 \| Money Market Funds
Assets
Money market funds	827,002	$ 1,551,027
Level 1 \| US Government Agencies Debt Securities
Assets
Debt Securities, Available-for-Sale	4,447,930
Level 2
Assets
Assets, Fair Value Disclosure	11,729,192
Level 2 \| Commercial Paper
Assets
Debt Securities, Available-for-Sale	$ 11,729,192

Investments, Debt and Equity Securities (Details) - AFS - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	$ 15,970,253
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	206,869
Debt Securities, Available-for-Sale	16,177,122	$ 0
Debt Securities, Available-for-Sale, Allowance for Credit Loss	0
Commercial Paper
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	11,577,167
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	152,025
Debt Securities, Available-for-Sale	11,729,192
US Government Agencies Debt Securities
Debt Securities, Available-for-Sale [Line Items]
Debt Securities, Available-for-Sale, Amortized Cost	4,393,086
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	54,844
Debt Securities, Available-for-Sale	$ 4,447,930

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

+ Details

Inventories

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Inventories

Inventories consist of the following:


	September 30, 2023		December 31, 2022
Purchased components	$	1,245,623	$	982,129

Finished goods	420,986		632,858
	$	1,666,609	$	1,614,987

The company recorded a charge of $63,420 in the nine months ended September 30, 2023 to reduce the carrying value of inventory to net realizable value.

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure

4. Securities

The Company's marketable debt securities are classified as either AFS or HTM pursuant to ASC 320 - Investments - Debt Securities. The following table summarizes the valuations and unrealized gains and losses of AFS securities which are recorded at estimated fair value as of September 30, 2023. The Company held no AFS securities as of December 31, 2022.


	September 30, 2023
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	4,393,086	$	54,844	$	—	$	—	$	4,447,930

Commercial paper	11,577,167		152,025		—		—		11,729,192
Total	$	15,970,253	$	206,869	$	—	$	—	$	16,177,122

HTM securities are valued at amortized cost. The Company held no HTM securities as of September 30, 2023. The following tables summarize the valuations of HTM securities as of December 31, 2022.


	December 31, 2022
Held-to-maturity securities	Amortized Cost		Credit Losses		Estimated Fair Value
U.S. government bonds	$	3,457,651	$	—	$	3,456,580
Corporate bonds	4,011,569		—		3,950,380
Commercial paper	9,395,487		—		9,387,914
Total	$	16,864,707	$	—	$	16,794,874

The Company evaluates all HTM and AFS securities for impairment at each reporting period. It determined that changes in the fair value of its securities at September 30, 2023 resulted primarily from interest rate fluctuations subsequent to the purchase date of the securities. There was no deterioration in the credit worthiness of the issuers and no credit losses were recorded as of September 30, 2023.

Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
Statements of Operations (Unaudited) - USD ($)	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from Contract with Customer, Including Assessed Tax	$ 1,203,164	$ 1,968,003	$ 4,583,679	$ 6,408,695
Other Nonoperating Income	166,783	0	166,783	0
Net loss	$ (1,768,737)	$ (1,606,254)	$ (4,879,940)	$ (3,724,739)
Earnings Per Share, Diluted	$ (0.21)	$ (0.23)	$ (0.61)	$ (0.53)
Earnings Per Share, Basic	$ (0.21)	$ (0.23)	$ (0.61)	$ (0.53)
Loss from operations	$ (1,960,898)	$ (1,712,991)	$ (5,294,422)	$ (3,885,299)
Operating expenses:
Research and development	592,654	1,074,954	2,045,588	2,701,330
Sales and marketing	943,795	810,209	2,504,630	2,235,646
General and administrative	1,206,231	1,102,260	3,843,643	3,468,452
Total operating expenses	2,742,680	2,987,423	8,393,861	8,405,428
Gross profit	781,782	1,274,432	3,099,439	4,520,129
Cost of revenues	421,382	693,571	1,484,240	1,888,566
Investment Income, Interest	$ 25,378	$ 106,737	$ 247,699	$ 160,560

Leases Leases (Tables)

9 Months Ended

Sep. 30, 2023

Leases [Abstract]

Lessee, Operating Lease, Liability, Maturity [Table Text Block]






2023	41,446
2024	165,785
2025	117,431
Total minimum lease payments	$	324,662

Discount rate, 15%	$	53,401
Lease obligation, current portion	148,391
Lease obligation, net of current portion	122,870
	$	324,662

Investments, Debt and Equity Securities (Tables)

9 Months Ended

Sep. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation


	September 30, 2023
			Gross Unrealized
Available-for-sale securities	Cost		Gains		Losses		Credit Losses		Estimated Fair Value
U.S. government bonds	$	4,393,086	$	54,844	$	—	$	—	$	4,447,930

Commercial paper	11,577,167		152,025		—		—		11,729,192
Total	$	15,970,253	$	206,869	$	—	$	—	$	16,177,122

Debt Securities, Held-to-Maturity, Allowance for Credit Loss


	December 31, 2022
Held-to-maturity securities	Amortized Cost		Credit Losses		Estimated Fair Value
U.S. government bonds	$	3,457,651	$	—	$	3,456,580
Corporate bonds	4,011,569		—		3,950,380
Commercial paper	9,395,487		—		9,387,914
Total	$	16,864,707	$	—	$	16,794,874