Note 8 - Debt - Credit Agreement (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Interest expense related to amortization of debt issuance costs		$ 1,586	$ 1,004
Credit Agreement [Member]
Debt issuance costs capitalized		3,100	0
Interest expense related to amortization of debt issuance costs		856	1,004
Credit facility interest expense(1)	[1]	$ 3,350	$ 4,611
Weighted average interest rate under credit facility(1)	[1]	3.70%	3.97%
Credit Agreement [Member] | Debt Issuance Costs Due to Amendments [Member]
Write off of debt issuance costs		$ 147	$ 0
Credit Agreement [Member] | Debt Issuance Costs Due to New Credit Facility [Member]
Write off of debt issuance costs		$ 583	$ 0

[1] Excludes interest expense related to amortization and write-off of debt issuance costs for the year ending December 31, 2021.