Note 10 - Employee Benefit Plans - Stock Options Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Outstanding (in shares)	745	1,027
Outstanding, weighted average exercise price (in dollars per share)	$ 10.64	$ 9.75
Granted (in shares)	24	102
Exercised (in shares)	(246)	(238)
Exercised, weighted average exercise price (in dollars per share)	$ 10.46	$ 5.41
Canceled (in shares)	(57)	(87)
Canceled, weighted average exercise price (in dollars per share)	$ 11.65	$ 14.57
Expired (in shares)	(10)	(59)
Expired, weighted average exercise price (in dollars per share)	$ 10.06	$ 15.83
Outstanding (in shares)	456	745
Outstanding, weighted average exercise price (in dollars per share)	$ 10.95	$ 10.64
Outstanding, weighted average remaining contractual (Year)	3 years 2 months 1 day
Outstanding, aggregate intrinsic value	$ 4,864
Vested and expected to vest (in shares)	449
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 10.88
Vested and expected to vest, weighted average remaining contractual term (Year)	3 years 29 days
Vested and expected to vest, aggregate intrinsic value	$ 4,818
Exercisable (in shares)	379
Exercisable, weighted average exercise price (in dollars per share)	$ 10.15
Exercisable, weighted average remaining contractual term (Year)	2 years 18 days
Exercisable, aggregate intrinsic value	$ 4,342