Note 5 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating lease costs	$ 909	$ 805	$ 2,745	$ 1,998
Short-term lease costs	534	498	1,627	1,158
Total operating lease costs	1,443	1,303	4,372	3,156
Variable lease costs	250	193	809	477
Total lease costs	$ 1,693	$ 1,496	$ 5,181	$ 3,633