Segments - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Consolidated revenue	$ 8,893	$ 16,806	$ 21,239	$ 28,437
Consolidated gross profit	2,603	2,421	6,869	3,908
Income (loss) from operations by segment	(2,036)	(1,204)	(1,884)	(3,837)
Segment income (loss) from operations	(2,036)	(1,204)	(1,884)	(3,837)
Total depreciation and amortization	579	559	1,151	1,145
Construction
Segment Reporting Information [Line Items]
Consolidated revenue	8,893	16,806	21,239	28,437
Operating Segments | Construction
Segment Reporting Information [Line Items]
Consolidated revenue	8,893	16,806	21,239	28,437
Consolidated gross profit	2,664	2,485	6,993	4,071
Income (loss) from operations by segment	199	290	1,981	(469)
Total depreciation and amortization	510	495	1,015	982
Operating Segments | Investments
Segment Reporting Information [Line Items]
Consolidated revenue	158	158	316	316
Consolidated gross profit	97	94	192	153
Income (loss) from operations by segment	(437)	80	(456)	139
Total depreciation and amortization	61	64	124	163
Intersegment elimination
Segment Reporting Information [Line Items]
Consolidated revenue	(158)	(158)	(316)	(316)
Consolidated gross profit	(158)	(158)	(316)	(316)
Income (loss) from operations by segment	(1,798)	(1,574)	(3,409)	(3,507)
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total depreciation and amortization	$ 8	$ 0	$ 12	$ 0