Bankruptcy Proceedings, Emergence and Fresh Start Accounting Plan of Reorganization (Details) - USD ($)	8 Months Ended
	Sep. 12, 2016	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2016	Aug. 11, 2016
Fresh-Start Adjustment [Line Items]
Bankruptcy Claims, amount reserved for outstanding claims		$ 0	$ 3,933,000
Debtor Reorganization Items, Legal and Advisory Professional Fees	$ 7,200,000
Plan of Reorganization, Escrow Account for Professional Fees	14,575,000
Plan of Reorganization, Cash Reserve	2,700,000
Plan of Reorganization, DIP Fees	100,000
Plan of Reorganization, Line of Credit Facility, Initial Borrowing	$ 75,400,000			$ 75,400,000
Plan of Reorganization, Common Stock reserved for Issuance of Management Incentive Plan	749,600
Plan of Reorganization, CS authorized for Disputed General Unsecured Claims and Non-Accredited Investor Holders of Senior Notes	816,454
Plan Of Reorganization, Backstop Parties Common Shares Received, Percent Of Common Stock	3.00%
Plan of Reorganization, Backstop Parties Common Shares Received	472,902
Plan of Reorganization, Percentage of Common Stock to holders of claims arising under the Senior Notes, general unsecured claims and to the Backstop Parties	51.00%
Plan of Reorganization, Rights Offering Issuance of Common Stock	7,633,588
Rights Offering, Rights Offering Amount	$ 49,943,000
Plan of Reorganization, percentage of commons stock lenders to receive net of backstop fee	41.00%
Plan of Reorganization, Senior Notes and Unsecured Claims Common Stock Exchanged				6,069,074
Liabilities Subject to Compromise, Debt and Accrued Interest	$ 1,122,000,000
Plan of Reorganization, Percent of Claims Attributable to Pre-Petition Completed					100.00%
Share-based Compensation Award, Tranche One [Member]
Fresh-Start Adjustment [Line Items]
Plan Of Reorganization, Shares Authorized, Percent Of Common Stock	5.00%
DIP Facility [Member]
Fresh-Start Adjustment [Line Items]
Debtor-in-Possession Financing, Borrowings Outstanding	$ 0