Note 11 - Share-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended					3 Months Ended		9 Months Ended
	Jan. 31, 2024	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2019	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2022	Mar. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number						3,991,629		3,991,629		4,657,635
Share-Based Payment Arrangement, Expense						$ 896	$ (202)	$ 1,814	$ 1,648
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross								1,495,000
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	6 years 7 months 28 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate								76.00%	49.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate								3.79%	3.64%
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount						2,657		$ 2,657
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition								2 years 6 months
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount						$ 1,773		$ 1,773
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition								3 years 3 months 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						275,422		275,422
The 2017 Stock Incentive Plan [Member] | Service-based Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number						2,701,463		2,701,463
The 2017 Stock Incentive Plan [Member] | Performance-based Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number						1,290,166		1,290,166
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense						$ 341	169	$ 776	$ 399
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] | 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] | Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense						$ 555	$ 33	$ 1,038	$ 1,249