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Impact of COVID-19 Pandemic - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Nov. 06, 2020
Aug. 14, 2020
May 07, 2019
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Oct. 01, 2020
Mar. 31, 2020
Apr. 25, 2019
Impact Of Coronavirus Global Pandemic [Line Items]                    
Workers' Compensation Discount, Description           We implemented several cost-cutting measures related to personnel, including a hiring freeze, a suspension of 2020 merit salary increases and a modification of the 2020 bonus program allowing awards to be paid in stock or a combination of stock and cash at our option. Additionally, the Chief Executive Officer’s 2019 bonus payout was deferred and in July 2020 the Chief Executive Officer accepted common stock in lieu of cash for the after-tax portion of his 2019 bonus.We also furloughed approximately 54% of our workforce beginning May 4, 2020. Additionally, effective August 14, 2020, we implemented a reduction in force of approximately 14% of our workforce. Furloughed employees not affected by the reduction in force returned to full time work on August 31, 2020. Effective May 4, 2020, we reduced compensation for salaried employees who were not furloughed. Salary reductions, which will be effective at least through the end of 2020, begin at 30% for the Chief Executive Officer, then 20% for the executive leadership team and reducing downward by staff level from there. In addition, the compensation for the members of our Board of Directors has been reduced by 30% for the last three quarters of 2020        
Reduction in Workforce   14.00%                
Credit facility available limit                 $ 22,000  
Repayments of lines of credit       $ 1,000 $ 5,000 $ 6,000        
Line of credit facility, Outstanding amount           20,000        
Line of credit facility, remaining borrowing capacity       $ 1,000   $ 1,000        
Proceeds from issuance of senior secured notes             $ 920,683      
Subsequent Event [Member]                    
Impact Of Coronavirus Global Pandemic [Line Items]                    
Line of credit facility, drawn amount               $ 4,000    
9.875% Senior secured Notes Due On 2024 [Member]                    
Impact Of Coronavirus Global Pandemic [Line Items]                    
Aggregate principal amount                   $ 905,000
Interest rate                   9.875%
Issue price as percentage of face value     99.512%              
9.875% Senior secured Notes Due On 2024 [Member] | Subsequent Event [Member]                    
Impact Of Coronavirus Global Pandemic [Line Items]                    
Aggregate principal amount $ 50,000                  
Interest rate 9.875%                  
Issue price as percentage of face value 103.50%                  
Proceeds from issuance of senior secured notes $ 51,800