Revenue (Schedule of Accounts Receivable) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Receivables [Abstract]
Completed contracts	$ 6,348	$ 10,612
Contracts in progress	23,639	65,415
Retainage	7,739	7,490
Accounts receivable, gross	37,726	83,517
Allowance for doubtful accounts	(564)	(564)
Total accounts receivable—net	$ 37,162	$ 82,953