Construction Contracts - Summary of Costs in Excess of Billings and Billings in Excess of Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Construction contract costs and estimated earnings in excess of billings
Beginning balance	$ 243	$ 138
Transferred to receivables	(266)	(138)
Construction contract costs and estimated earnings not billed during the period	121	54
Changes due to cumulative catch-up adjustment arising from changes in the estimate of the stage of completion	23	0
Ending balance	121	54
Billings in excess of construction contract costs and estimated earnings
Beginning balance	4,881	6,088
Revenue recognized that was included in the balance at the beginning of the period	(4,881)	(6,088)
Increases due to new billings, excluding amounts recognized as revenue during the period	15,055	3,143
Changes due to cumulative catch-up adjustment arising from changes in the estimate of the stage of completion	(1)	(81)
Ending balance	$ 15,054	$ 3,062