Note 10 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating leases	$ 527	$ 669	$ 600
Asset amortization	462	489	355
Interest on lease liabilities	19	34	37
Variable lease cost	95	99	62
Short-term lease cost	87	59	42
Sublease income	(123)	(81)	0
Total net lease cost	$ 1,067	$ 1,269	$ 1,096