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Note 9 - Stock-based Compensation and Incentive Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Date Fair Value	$ 4,460	$ 6,395	$ 19,193
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	3,300	4,700	6,300
Employee Service Sharebased Compensation Nonvested Awards Compensation Cost Not Yet Recognized Net Of Tax	$ 2,600	$ 3,700	5,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years
Restricted Stock Units (RSUs) [Member] | Time Based Shares [Member] | During Fiscal 2021 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance (in shares)	299,000
Phantom Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Grant Date Fair Value			$ 1,100
A2017 Incentive Plan [Member] | Plan Of Reorganization [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years
A2017 Incentive Plan [Member] | Plan Of Reorganization [Member] | Restricted Stock Units (RSUs) [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	1 year
Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		603,756
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)	488,890
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 11.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)	8 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in shares)	114,866
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in shares)	0
Stock Option Plan [Member] | Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)	3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1,200
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Stock Option Plan [Member] | Share-based Payment Arrangement, Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)	$ 3.23
Stock Option Plan [Member] | Share-based Payment Arrangement, Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price (in dollars per share)	$ 3.69

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