Note 15 - Stock-based Compensation and Other Benefit Plans - SAR Activity (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022
Outstanding, number of underlying shares (in shares)	362
Outstanding, weighted average exercise price per share (in dollars per share)	$ 1.81
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	0
Granted, weighted average exercise price per share (in dollars per share)	$ 0
Exercised, number of underlying shares (in shares)	(153)
Exercised, weighted average exercise price per share (in dollars per share)	$ 1.71
Unvested SARs forfeited, number of underlying shares (in shares)	0
Unvested SARs forfeited, weighted average exercise price per share (in dollars per share)	$ 0
Vested SARs expired, number of underlying shares (in shares)	0
Vested SARs expired, weighted average exercise price per share (in dollars per share)	$ 0
Outstanding, number of underlying shares (in shares)	209
Outstanding, weighted average exercise price per share (in dollars per share)	$ 1.88
Outstanding, weighted average remaining contractual term (Year)	1 year 4 months 9 days
Outstanding, aggregate intrinsic value	$ 1,055
Exercisable, number of underlying shares (in shares)	209
Exercisable, weighted average exercise price per share (in dollars per share)	$ 1.88
Exercisable, weighted average remaining contractual term (Year)	1 year 4 months 9 days
Exercisable, aggregate intrinsic value	$ 1,055