Note 6 - Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating lease costs	$ 3,701	$ 2,817	$ 839
Short-term lease costs	2,141	1,727	277
Total operating lease costs	5,842	4,544	1,116
Variable lease costs	1,104	749	357
Total lease expense	$ 6,946	$ 5,293	$ 1,473