Note 10 - Share-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended						3 Months Ended		9 Months Ended
	Jun. 30, 2022	Apr. 30, 2022	Jan. 31, 2022	Jun. 30, 2021	Jun. 30, 2020	May 31, 2019	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Mar. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							2,221,673		2,221,673		5,491,399
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross									60,000
Share-Based Payment Arrangement, Expense							$ (202)	$ 872	$ 1,648	$ 2,628
Performance Shares [Member] | Chief Executive Officer and President [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross		1,207,698
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate									0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term									6 years 7 months 28 days	3 years 5 months 15 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate									49.00%	49.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate									3.64%	1.17%
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount							1,168		$ 1,168
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition									2 years 8 months 23 days
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount							$ 757		$ 757
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition									1 year 7 months 9 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							4,438,539		4,438,539
Share-Based Payment Arrangement, Accelerated Cost		$ 178	$ 242
The 2017 Stock Incentive Plan [Member] | Service-based Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							1,529,275		1,529,275
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							692,398		692,398
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		1,614,230					1,614,230
Share Price		$ 2.89
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		49.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate		2.90%
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period		921,832
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Minimum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period		4 years
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Maximum [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period		7 years
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		$ 250,000
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Share-Based Payment Arrangement, Tranche Two [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vesting, Sustained Market Capitalization		500,000
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member] | Chief Executive Officer and President [Member] | Share-Based Payment Arrangement, Tranche Three [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vesting, Sustained Market Capitalization		$ 1,000,000
The 2017 Stock Incentive Plan [Member] | Share-Based Payment Arrangement, Option [Member]
Share-Based Payment Arrangement, Expense							$ 169	308	$ 399	$ 1,448
The 2017 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense							$ (33)	$ 564	$ 1,249	$ 1,180