Note 7 - Trade Accounts Receivable - Summary of Trade Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Trade accounts receivable, current	$ 5,947	$ 5,541
Trade accounts receivable, long-term	9	37
Allowance for doubtful accounts	(134)	(114)
Trade accounts receivable, net	5,822	5,464
Unpaid deferred revenue included in trade accounts receivable	$ 2,073	$ 2,183