Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 903	$ 633
KBS Builders
Property, Plant and Equipment [Line Items]
Warranty period	12 months
EBGL
Property, Plant and Equipment [Line Items]
Warranty period	25 years
Building and Improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	P30Y
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	P3Y
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	P7Y