Bankruptcy Proceedings, Emergence and Fresh Start Accounting Schedule of Reconciliation of Enterprise Value to Reorganization Value (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2016	Sep. 13, 2016	Sep. 12, 2016
Reorganizations [Abstract]
Fresh-Start Adjustment, Enterprise Value			$ 266,200		$ 234,831
Cash and cash equivalents	$ 17,864	$ 11,017			31,414
Short-term Debt, Fair Value					(75,350)
Fair Value of Successor Common Stock					$ 190,895
Common Stock, Shares, Outstanding					14,992,018
Common stock, par value	$ 0.01	$ 0.01		$ 0.01	$ 12.73
Postconfirmation, Current Liabilities					$ 54,171
Postconfirmation, Noncurrent Liabilities Excluding Long-term Debt					13,558
Reorganization Value					$ 333,974