The number of options issued during the period from cashless stock options exercised.

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Number of fully vested and expected to vest equity instrument other than options outstanding that can be converted into shares under share based compensation plan.

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Number of vested non-option equity instruments deferred for issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Note 8 - Stock-based Compensation Expense (Details Textual) - USD ($)			12 Months Ended
	Aug. 03, 2020	May 04, 2020	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			135,000
Share-Based Payment Arrangement, Expense			$ 399,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 1.49	$ 1.10
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)			4,000	22,000
Options Issued During Period, Cashless Stock Options Exercised (in shares)			3,000	5,000
Proceeds from Stock Options Exercised			$ 5,000	$ 5,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Using Cash (in shares)			2,000	2,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)			1,000,000
Stock Repurchased During Period, Shares (in shares)			0	0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)			72,000
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			131,000	165,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			132,000	168,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares)			6,000	10,000		13,000
Restricted Stock Units (RSUs) [Member] \| Selling, General and Administrative Expenses [Member]
Share-Based Payment Arrangement, Expense				$ 420,000
Share-Based Payment Arrangement, Expense, after Tax			$ 399,000
Restricted Stock Units (RSUs) [Member] \| Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			120,000
Share-Based Payment Arrangement, Expense			$ 288,000
Restricted Stock Units (RSUs) [Member] \| Non Employee Directors and Corporate Secretary [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			1,000
Share-Based Payment Arrangement, Expense			$ 6,000
Share-Based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			3,000
Share-Based Payment Arrangement, Expense			$ 10,000	2,000
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount			$ 80,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			4 years
Incentive Compensation Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)					2,580,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)			1,219,000
Incentive Compensation Plan [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			752,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			123,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested And Expected To Vest, Outstanding, Number (in shares)			624,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares)			6,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total			$ 11,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Vested, Deferred for Issuance (in shares)			38,000
Incentive Compensation Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Employees [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			31,000
Incentive Compensation Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			340,000
Incentive Compensation Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Non Employee Directors and Corporate Secretary [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			53,000
Share-Based Payment Arrangement, Expense			$ 6,000
Share-Based Payment Arrangement, Expense, Tax Benefit			$ 1,500
Incentive Compensation Plan [Member] \| Restricted Stock Units (RSUs) [Member] \| Non Employee Directors [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)			328,000
Executive Equity Awards [Member] \| Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense			$ 288,000	$ 331,000
Executive Equity Awards [Member] \| Restricted Stock Units (RSUs) [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	10,000	50,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Day)	30 days
Stock Issued During Period, Shares, Issued for Services (in shares)			120,000	120,000