Operating Segments - Profit by Reportable Segment (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment									2
Segment Reporting Information [Line Items]
Total revenue	$ 8,614	$ 10,494	$ 11,103	$ 11,828	$ 19,218	$ 11,937	$ 14,741	$ 13,130	$ 42,039	$ 59,026	$ 58,988
Total profit from segments	$ (3,677)	$ (5,168)	$ (8,771)	$ (3,002)	$ 3,938	$ (2,303)	$ 1,491	$ (3,238)	(20,618)	(112)	(390)
Operating Segments
Segment Reporting Information [Line Items]
Total profit from segments									16,948	27,549	20,537
Operating Segments | Residential Segment
Segment Reporting Information [Line Items]
Total revenue									14,495	14,686	13,517
Operating expenses									(8,167)	(8,482)	(9,305)
Profit from segment									6,328	6,204	4,212
Operating Segments | Commercial Segment
Segment Reporting Information [Line Items]
Total revenue									23,313	37,223	32,714
Operating expenses									(12,693)	(15,878)	(16,389)
Profit from segment									$ 10,620	$ 21,345	$ 16,325