Fair Value Measurements - Significant Unobservable Inputs in the Fair Value Measurement of Level 3 Liabilities (Details) - Fair Value, Inputs, Level 3 $ in Thousands	Mar. 31, 2020 USD ($)
Monte Carlo
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes payable and Long-term royalty based debt	$ 151,000
Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt	113,708
Monte Carlo and Discounted Cash Flow
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liabilities	$ 7,035
Minimum | Monte Carlo | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes payable and Long-term royalty based debt, measurement input	0.1399
Minimum | Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.1346
Minimum | Monte Carlo and Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liabilities, measurement input	0.1346
Maximum | Monte Carlo | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes payable and Long-term royalty based debt, measurement input	0.1458
Maximum | Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.1384
Maximum | Monte Carlo and Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liabilities, measurement input	0.1458
Weighted Average | Monte Carlo | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Notes payable and Long-term royalty based debt, measurement input	0.1415
Weighted Average | Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Long-term debt, measurement input	0.1374
Weighted Average | Monte Carlo and Discounted Cash Flow | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded derivative liabilities, measurement input	0.1404