Note 3 - Supplemental Balance Sheet Information (in Thousands) - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts receivable	$ 65,368	$ 54,735
Less allowance for doubtful accounts	(1,654)	(564)
Accounts receivable, net	63,714	54,171
Trade Accounts Receivable [Member]
Accounts receivable	53,658	44,424
Unbilled [Member]
Accounts receivable	10,436	8,168
Non-Trade [Member]
Accounts receivable	$ 1,274	$ 2,143