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Note N - Stock Options (Details Textual) $ / shares in Units, $ in Thousands						12 Months Ended
	Apr. 30, 2026	Apr. 29, 2026	Aug. 08, 2025 shares	Dec. 14, 2023 shares	Jan. 27, 2016 shares	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2021 shares
Common Stock, Capital Shares Reserved for Future Issuance (in shares)				33,333
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)						8 months 8 days	1 year 1 month 20 days	11 months 15 days
Share Price (in dollars per share) \| $ / shares						$ 5.4	$ 17.1	$ 30
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)						0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) \| $ / shares						$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)						0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value \| $						$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)						(0)	(0)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value \| $						$ 0	$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares (in shares)						0	0
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount \| $							$ 0
In The Money Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number (in shares)						0	0	0
Forecast [Member] \| Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	10	10
The 2023 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)			70,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in shares)						28,300
Stock Issued During Period, Shares, Restricted Stock Award, Forfeited (in shares)						3,026
Stock Issued During Period, Shares, Issued for Services (in shares)						2,316
The 2023 Stock Incentive Plan [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent				100.00%
The 2023 Stock Incentive Plan [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent				110.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)				10 years
The 2015 Equity Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)					1,042				4,383
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)					10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)						0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares)						(0)	(0)
The 2015 Equity Incentive Plan [Member] \| Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent									100.00%
The 2015 Equity Incentive Plan [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent									110.00%