Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 246,168	$ 263,523
Convertible Debt \| 3.00% / 5.00% Convertible Senior Secured PIK Toggle Notes Due August 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	96,462
Long-term debt	95,135
Derivative liability	38,962	0
Convertible Debt \| 5.00% / 7.00% Convertible Senior Secured PIK Toggle Notes Due August 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	3,247	136,085
Long-term debt	3,757	193,660
Line of Credit \| Revolving B Credit Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of debt	25,882	25,082
Long-term debt	$ 26,570	$ 25,788

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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