Note 3 - Revenue - Components of Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Trade receivables	$ 3,804	$ 4,605
Unbilled receivables	2,946	3,082
Other short-term receivables	141	152
Allowance for credit losses	(110)	(110)	$ (223)
Total accounts receivable	$ 6,781	$ 7,729