Basis of Presentation and Nature of Operations (Details) - USD ($)	Jun. 30, 2018	Apr. 11, 2018	Dec. 31, 2017	Oct. 27, 2017	Jun. 30, 2017
Debt Instrument [Line Items]
Cash and cash equivalents	$ 30,683,000		$ 38,520,000		$ 34,244,000
Restricted cash	47,125,000		47,703,000		$ 2,432,000
Total liquidity	45,400,000
New ABL Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	150,000,000.0	$ 150,000,000		$ 120,000,000
Line of credit borrowings	90,000,000		$ 64,000,000
Available borrowing capacity	$ 14,700,000