Fair Value Measurements - Carrying Value and Fair Value of Long-Term Debt and Other Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Reported Value Measurement | 5% Convertible Senior Notes due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 44,800
Fair Value, Inputs, Level 2 | Reported Value Measurement | 5% Convertible Senior Notes due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	44,783	$ 100,411
Fair Value, Inputs, Level 2 | Reported Value Measurement | 7.75% Senior Secured Note due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	292,015	290,763
Fair Value, Inputs, Level 2 | Reported Value Measurement | Term Loan B Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	230,474
Fair Value, Inputs, Level 2 | Estimate of Fair Value Measurement | 5% Convertible Senior Notes due 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	66,477	121,488
Fair Value, Inputs, Level 2 | Estimate of Fair Value Measurement | 7.75% Senior Secured Note due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	309,375	270,000
Fair Value, Inputs, Level 2 | Estimate of Fair Value Measurement | Term Loan B Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	240,625
Fair Value, Inputs, Level 3 | Reported Value Measurement | Warrant
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrants not settleable in cash, fair value	8,206	5,007
Fair Value, Inputs, Level 3 | Reported Value Measurement | Mid Pac Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	1,433	1,466
Fair Value, Inputs, Level 3 | Reported Value Measurement | Retail Property Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	43,226
Fair Value, Inputs, Level 3 | Estimate of Fair Value Measurement | Warrant
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Warrants not settleable in cash, fair value	8,206	5,007
Fair Value, Inputs, Level 3 | Estimate of Fair Value Measurement | Mid Pac Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	1,433	$ 1,466
Fair Value, Inputs, Level 3 | Estimate of Fair Value Measurement | Retail Property Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 43,226