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. 18, 2025	Feb. 20, 2024	Mar. 15, 2023	May 31, 2024	May 31, 2021	May 31, 2019	May 31, 2015	Jun. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Feb. 29, 2024	Mar. 31, 2023
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
Share Price (in dollars per share)									$ 1.41	$ 1.41
Restricted Stock [Member]
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount									$ 3,700	$ 3,700
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)									1 year 4 months 24 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)										198,000
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)									$ 2.32	$ 2.32	$ 2.84
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)										589,000
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									$ 500	$ 500
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)										75,000
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)									$ 2.26	$ 2.26	$ 2.28	$ 2.28	$ 3.71
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	[1]									151,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Performance Target Cap, Percentage			100.00%	100.00%
Share-Based Payment Arrangement, Number of Shares Eligible to Vest (in shares)			0
Annual Revenue Growth Rate, Percentage		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 [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)								399,562	4,313,156	4,313,156
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 [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 [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 [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 [Member] | Restricted Stock [Member] | Independent Board Members [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									1 year
Equity Incentive Plan [Member] | Restricted Stock [Member] | Time Based Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									3 years
Equity Incentive Plan [Member] | Restricted Stock [Member] | Performance Based Vesting [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									12 years
Equity Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)									4 years
Equity Incentive Plan [Member] | Stock Appreciation Rights (SARs) [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term (Year)									10 years

[1] The number of shares presented assumes the achievement of 100% of a target financial performance metric to be determined by the Company’s Compensation Committee and will be subject to an at-risk, performance shares agreement.