Note 11 - Share-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended						3 Months Ended		12 Months Ended
	Apr. 01, 2022	Jan. 31, 2024	Oct. 31, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2019	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number								4,827,981		4,827,981	4,657,635
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross								535,000
Share-Based Payment Arrangement, Expense								$ 675	$ 628
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate								0.00%	0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term								6 years	0 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate								76.00%	0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate								3.89%	0.00%
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount								$ 4,409		$ 4,409
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition										2 years 6 months 29 days
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount								$ 2,554		$ 2,554
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition										5 years 3 days
The 2017 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized				9,000,000								2,000,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized				1,500,000	1,500,000	1,900,000	2,100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant								629,966		629,966
The 2017 Stock Incentive Plan [Member] | Service-based Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number								2,845,417		2,845,417
The 2017 Stock Incentive Plan [Member] | Performance-based Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number								1,982,564		1,982,564
The 2017 Stock Incentive Plan [Member] | Performance-based Options [Member] | Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	692,398		1,290,166
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense								$ 484	$ 313
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period		4 years 3 months 18 days
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross		632,911
Share Price		$ 3.4
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term		10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate		78.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		4.10%
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Share-Based Payment Arrangement, Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vesting, Sustained Market Capitalization		$ 1,000,000
The 2017 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense								$ 191	$ 315