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Note 9 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
	Feb. 20, 2024	Mar. 15, 2023	May 31, 2024	May 31, 2021	May 31, 2019	May 31, 2015	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Feb. 28, 2025	Feb. 28, 2024
Share-Based Payment Arrangement, Amount Capitalized									$ 0		$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)							0	0	0	0
Restricted Stock [Member]
Share Price (in dollars per share)							$ 72.08		$ 72.08
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount							$ 9,400		$ 9,400
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)									1 year 7 months 6 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)									410,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)							$ 7.71		$ 7.71		$ 4.23
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									59,000
Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									4 years
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount							$ 300		$ 300
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)									1 year 2 months 12 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)									73,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)							$ 2.25		$ 2.25		$ 2.25		$ 2.23	$ 2.28
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									0
Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Target Cap, Percentage	100.00%	100.00%
Annual Revenue Growth Rate, Percentage											195.15%	200.00%
Performance Shares [Member] \| Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	223,590	223,590
Performance Shares [Member] \| Chief Financial Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	77,600	77,600
Performance Shares [Member] \| Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)									0
Equity Incentive Plan 2015 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)						399,562
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)			3,600,000	3,600,000	1,600,000	3,000,000
Equity Incentive Plan 2025 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)							4,313,156		4,313,156
Equity Incentive Plan 2025 [Member] \| Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									4 years
Equity Incentive Plan 2025 [Member] \| Share-Based Payment Arrangement, Option [Member] \| Consultant [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									1 year
Equity Incentive Plan 2025 [Member] \| Share-Based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)									10 years
Equity Incentive Plan 2025 [Member] \| Restricted Stock, Restricted Stock Units, and Performance Awards [Member] \| Time Based Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									3 years
Equity Incentive Plan 2025 [Member] \| Restricted Stock, Restricted Stock Units, and Performance Awards [Member] \| Performance Based Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									12 years