Annual report pursuant to Section 13 and 15(d)

Bankruptcy Proceedings, Emergence and Fresh Start Accounting Plan of Reorganization (Details)

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