Note 8 - Trade Accounts Receivable - Summary of Trade Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Trade accounts receivable, current	$ 4,940	$ 5,541
Trade accounts receivable, long-term	23	37
Allowance for doubtful accounts	(114)	(114)
Trade accounts receivable, net	4,849	5,464
Unpaid deferred revenue included in trade accounts receivable	$ 1,204	$ 2,183