Business Combination - Narrative (Details) $ in Thousands		12 Months Ended
	Oct. 04, 2016 USD ($) shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Aug. 01, 2017 installment	Jun. 30, 2017 USD ($) installment
Business Acquisition [Line Items]
Consideration for KBS acquisition in cash paid at closing		$ 0	$ 5,211
Monthly payments payable		$ 4,129	15,744
Expenses for professional fees			$ 200
EBGL Acquisition
Business Acquisition [Line Items]
Consideration for KBS acquisition in cash paid at closing	$ 5,211
Payment paid at closing	3,000
Deferred payments payable	1,000
Contingent earn out payment	1,000				$ 900
Net purchase price	$ 200
EBGL Sellers
Business Acquisition [Line Items]
Deferred payments payable					$ 750
Number of common stock shares issued for acquisition (in shares) | shares	100,000
Deferred payments, remaining installments | installment				16	3
Monthly payments payable					$ 1,800
Contingent consideration initial payment payable					$ 200