Revenue Recognition - Summary of Changes in Customer Deposits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Change In Contract With Customer, Liability [Roll Forward]
December 31, 2017	$ 0
Revenue recognized that was included in deposit at beginning of period	(982)
Increase due to cash received, excluding amounts recognized as revenue during the period	184
December 31, 2018	184
Modular Home Manufacturing
Change In Contract With Customer, Liability [Roll Forward]
Revenue recognized that was included in deposit at beginning of period	(682)
Increase due to cash received, excluding amounts recognized as revenue during the period	180
December 31, 2018	180
Structural Wall Panel Manufacturing
Change In Contract With Customer, Liability [Roll Forward]
Revenue recognized that was included in deposit at beginning of period	(300)
Increase due to cash received, excluding amounts recognized as revenue during the period	4
December 31, 2018	$ 4