Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Amounts due under Second Amended and Restated Credit Agreement	$ 72,657
Amounts due under Prior Credit Agreement		55,787
PIK interest payable related to Credit Agreements		27,178
Plus: 2% exit fee on Prior Credit Agreement		254
Gross long-term debt	72,657	83,219
Less: discount on Credit Agreements		(5,114)
Less: total debt issuance costs on Credit Agreements		(166)
Long-term debt, less issuance costs	$ 72,657	$ 77,939