Note 5 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating lease costs	$ 929	$ 679	$ 1,836	$ 1,154
Short-term lease costs	519	450	986	661
Total operating lease costs	1,448	1,129	2,822	1,815
Variable lease costs	254	157	559	284
Total lease costs	$ 1,702	$ 1,286	$ 3,381	$ 2,099