Note 9 - Share-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended					3 Months Ended		6 Months Ended
	Apr. 01, 2022	Jun. 30, 2022	Apr. 30, 2022	Jan. 31, 2022	Jun. 30, 2021	May 31, 2019	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022	Mar. 31, 2017
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							3,568,249		3,568,249		5,491,399
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross									60,000
Share-Based Payment Arrangement, Expense							$ 1,221	$ 727	$ 1,849	$ 1,756
Performance Shares [Member] | Chief Executive Officer and President [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross			1,049,145
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	1 year 9 months 25 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%	1.09%
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount							2,609		$ 2,609
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition									3 years 1 month 13 days
Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount							$ 1,115		$ 1,115
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition									1 year 9 months 25 days
The 2017 Stock Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized		9,000,000						9,000,000		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	2,100,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant							2,848,936		2,848,936
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							1,954,019		1,954,019
The 2017 Stock Incentive Plan [Member] | Performance Shares [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number							1,614,230		1,614,230
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
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%
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							$ 255	$ 408	$ 567	$ 1,145
The 2017 Stock Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-Based Payment Arrangement, Expense	$ 319						$ 966		$ 1,282	$ 611