Accounts Receivable - Balance (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts Receivable
Trade accounts receivable	$ 58,402	$ 68,886
Unbilled accounts receivable	9,375	11,915
Accounts receivable, gross	67,777	80,801
Less allowance	(231)	(218)
Accounts receivable, net	$ 67,546	$ 80,583