Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Details)

v3.8.0.1
Long-Term Debt - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Sep. 07, 2016
May 31, 2015
Mar. 31, 2018
Dec. 31, 2017
9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020        
Debt Instrument [Line Items]        
Debt instrument interest rate 9.00%   9.00% 9.00%
Debt instrument maturity date     May 15, 2020 May 15, 2020
Debt instrument paid in kind interest rate     10.75% 10.75%
Debt instrument payment terms     Interest is payable on May 15 and November 15 of each year. The Second Lien PIK Toggle Notes contain provisions whereby certain semi-annual interest is added to the principal amount through payment-in-kind instead of being paid in cash in the then current semi-annual period. For the interest period from November 15, 2017 up to and including March 6, 2018, we elected the option to pay that portion of interest in kind at the rate of 10.75% per annum.  
Debt instrument stated interest rate percentage for payment-in-kind 10.75%      
Cash interest payable stub period     Mar. 07, 2018  
Revolving Bank Credit Facility Due November 2018        
Debt Instrument [Line Items]        
Revolving bank credit facility borrowing base     $ 150,000,000  
Revolving bank credit facility maximum lender commitment     $ 150,000,000  
First lien leverage ratio     200.00%  
Outstanding balances on the revolving bank credit facility (including letters of credit)     $ 5,000,000  
Unused portion of the borrowing base commitment fee     0.50%  
Credit agreement expiration date     Nov. 08, 2018  
Revolving bank credit facility borrowings outstanding     $ 0 $ 0
Letters of credit outstanding     300,000  
Remaining availability     149,700,000  
Revolving Bank Credit Facility Due November 2018 | Scenario Covenants        
Debt Instrument [Line Items]        
Maximum unrestricted cash balance if revolver balance is above $5 million     $ 35,000,000  
Revolving Bank Credit Facility Due November 2018 | Minimum        
Debt Instrument [Line Items]        
Current ratio     100.00%  
Revolving Bank Credit Facility Due November 2018 | Minimum | Eurodollar        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     3.00%  
Revolving Bank Credit Facility Due November 2018 | Maximum | Eurodollar        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate     4.00%  
11.00% 1.5 Lien Term Loan, Due November 2019        
Debt Instrument [Line Items]        
Debt instrument interest rate 11.00%      
Debt instrument maturity date Nov. 15, 2019      
Debt instrument payment terms     Interest accrues at 11.00% per annum and is payable quarterly in cash.  
Debt instrument frequency of interest payment in cash     quarterly  
Debt instrument, maturity date, description     1.5 Lien Term Loan with a maturity date of November 15, 2019. The maturity date will accelerate to February 28, 2019 if the remaining Unsecured Senior Notes have not been extended, renewed, refunded, defeased, discharged, replaced or refinanced by February 28, 2019.  
11.00% 1.5 Lien Term Loan, Due November 2019 | Minimum        
Debt Instrument [Line Items]        
Unsecured senior notes repurchase price limit percentage     65.00%  
Unsecured senior notes repurchase basket limit     $ 35,000,000  
9.00 % Second Lien Term Loan, Due May 2020        
Debt Instrument [Line Items]        
Debt instrument interest rate   9.00% 9.00% 9.00%
Debt instrument maturity date     May 15, 2020 May 15, 2020
Debt instrument payment terms     Interest on the Second Lien Term Loan is payable in arrears semi-annually on May 15 and November 15.  
Debt instrument discount rate   1.00%    
Annual effective interest rate     9.60%  
8.50%/10.00% Third Lien PIK Toggle Notes, Due June 2021        
Debt Instrument [Line Items]        
Debt instrument interest rate 8.50%   8.50% 8.50%
Debt instrument maturity date     Jun. 15, 2021 Jun. 15, 2021
Debt instrument paid in kind interest rate     10.00% 10.00%
Debt instrument payment terms     The maturity date will accelerate to February 28, 2019 if the remaining Unsecured Senior Notes have not been extended, renewed, refunded, defeased, discharged, replaced or refinanced by February 28, 2019. Interest is payable on June 15 and December 15 of each year. The Third Lien PIK Toggle Notes contain interest provisions whereby certain semi-annual interest is added to the principal amount through payment-in-kind instead of being paid in cash in the then current semi-annual period. For interest periods up to and including September 6, 2018, if we so elect, we have the option to pay all or a portion of interest in kind at a rate of 10.00% per annum.  
Debt instrument stated interest rate percentage for payment-in-kind 10.00%      
Cash interest payable stub period     Sep. 07, 2018  
8.50% Unsecured Senior Notes, Due June 2019        
Debt Instrument [Line Items]        
Debt instrument interest rate     8.50% 8.50%
Debt instrument maturity date     Jun. 15, 2019 Jun. 15, 2019
Debt instrument payment terms     semi-annually in arrears on June 15 and December 15  
Annual effective interest rate     8.40%  
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020        
Debt Instrument [Line Items]        
Debt instrument maturity date     May 15, 2020  
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Minimum        
Debt Instrument [Line Items]        
Debt instrument interest rate 9.00%      
Exchange Transaction | 9.00%/10.75% Second Lien PIK Toggle Notes, Due May 2020 | Maximum        
Debt Instrument [Line Items]        
Debt instrument paid in kind interest rate 10.75%      
Exchange Transaction | 1.5 Lien Term Loan        
Debt Instrument [Line Items]        
Interest expense recorded for new debt     $ 0