Long-Term Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 117,333	$ 72,942
Less deferred loan costs, net of amortization	0	0
Subtotal	117,333	72,942
Less current portion of long-term debt	15,032	15,764
Total long-term debt, net of deferred loan costs	102,301	57,178
Equipment financing | Equipment financing
Debt Instrument [Line Items]
Total debt	17,333	17,942
Revolving Credit Facility | Line of Credit | ABL Facility
Debt Instrument [Line Items]
Total debt	$ 100,000	$ 55,000