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Note 3 - Shareholders' Equity (Details Textual) - USD ($) Pure in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2020
Stock Repurchased and Retired During Period, Shares (in shares)	21,800	181,100	21,800	402,513
Payments for Repurchase of Common Stock	$ 99,000	$ 830,000	$ 99,000	$ 2,008,000
Share Repurchase Program, Remaining Authorized, Amount	1,298,000		$ 1,298,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate			0.00%
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			12,425
Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense			$ 23,000	$ 29,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 11,000		$ 11,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 months
The2004 Plan Member
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	5,000,000		5,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross					5,009,750
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	3 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period	5 years
Incentive Plan 2020 [Member]
Common Stock, Capital Shares Reserved for Future Issuance	1,800,000		1,800,000
Incentive Plan 2020 [Member] \| Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period			12,425	9,870
Share-Based Payment Arrangement, Expense			$ 236,000	$ 243,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 128,000		$ 128,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 months 21 days