Annual stock based compensation service fee.

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- Definition

Increased annual stock based compensation service fee.

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Share-based compensation arrangement by share-based payment award, period options can be exercised after grant date.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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

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Number of shares authorized for issuance under share-based payment arrangement.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Note 3 - Stock-Based Compensation and Shareholders' Equity (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense	$ 35,000	$ 19,000	$ 65,000	$ 38,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 575,000		$ 575,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition			56 months
Share-based compensation arrangement by share-based payment award, options, grants in period, gross			68,975	40,000
Share-based compensation arrangement by share-based payment award, options, forfeitures in period			21,050	24,275
Share-based compensation arrangement by share-based payment award, options, exercises in period			5,325
Share-based compensation arrangement by share-based payment award, options, outstanding, number	179,875	137,275	179,875	137,275	137,275	121,550
Share-based compensation arrangement by share-based payment award, options, grants in period, weighted average grant date fair value			$ 6.64	$ 3.08
Non-Employee [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized	50,000		50,000
Share-based compensation arrangement by share-based payment award, shares issued			5,853
Stock repurchase program remaining number of shares	44,147		44,147
Annual stock based compensation service fee			$ 8,000
Increased annual stock based compensation service fee			$ 19,230
The 2015 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized	300,000		300,000
Share-based compensation arrangement by share-based payment award, options, grants in period, gross			321,525
Share-based compensation arrangement by share-based payment award, options, forfeitures in period			115,500
Share-based compensation arrangement by share-based payment award, options, exercises in period			26,150
Share-based compensation arrangement by share-based payment award, options, outstanding, number	179,875		179,875
The 2025 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized	500,000		500,000
Employee Stock Purchase Plan 2021 [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense			$ 13,000	$ 13,000
Share-based compensation arrangement by share-based payment award, number of shares authorized	30,000		30,000
Share-based compensation arrangement by share-based payment award, shares issued			5,817
Discount rate on common stock			10.00%
Expiration date			May 31, 2026
Director Compensation Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense			$ 86,000	$ 36,000
Employee Stock Option [Member] \| The 2015 Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, period options can be exercised after grant date			6 months
Employee Stock Option [Member] \| The 2015 Plan [Member] \| First Anniversary [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage			20.00%
Employee Stock Option [Member] \| The 2015 Plan [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, expiration period			10 years