Fair Value Accounting - Schedule of Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Warrant Liability
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	$ 403	$ 372
Contingent Value Rights
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities		60
Contingent Consideration
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	30,071	29,114
Put Option Liability
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	6,650	3,261
Level 3 | Warrant Liability
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	403	372
Level 3 | Contingent Value Rights
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities		60
Level 3 | Contingent Consideration
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	30,071	29,114
Level 3 | Put Option Liability
Fair Value Liabilities Measured On Recurring Basis [Line Items]
Total liabilities	$ 6,650	$ 3,261