Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Total assets	$ 120,176	$ 80,769
Liabilities:
Total liabilities	43,847	44,747
Derivative liabilities - Non-current
Liabilities:
Total liabilities	42,900	35,000
Acquisition consideration payable
Liabilities:
Total liabilities	398	908
Acquisition consideration payable, non-current
Liabilities:
Total liabilities	549	39
Derivative liabilities
Liabilities:
Total liabilities		8,800
Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	120,176	80,769
Liabilities:
Total liabilities	0	0
Quoted Prices in Active Markets (Level 1) | Derivative liabilities - Non-current
Liabilities:
Total liabilities	0	0
Quoted Prices in Active Markets (Level 1) | Acquisition consideration payable
Liabilities:
Total liabilities	0	0
Quoted Prices in Active Markets (Level 1) | Acquisition consideration payable, non-current
Liabilities:
Total liabilities	0	0
Quoted Prices in Active Markets (Level 1) | Derivative liabilities
Liabilities:
Total liabilities		0
Significant Other Observable Inputs (Level 2)
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) | Derivative liabilities - Non-current
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) | Acquisition consideration payable
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) | Acquisition consideration payable, non-current
Liabilities:
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) | Derivative liabilities
Liabilities:
Total liabilities		0
Significant Unobservable Inputs (Level 3)
Assets:
Total assets	0	0
Liabilities:
Total liabilities	43,847	44,747
Significant Unobservable Inputs (Level 3) | Derivative liabilities - Non-current
Liabilities:
Total liabilities	42,900	35,000
Significant Unobservable Inputs (Level 3) | Acquisition consideration payable
Liabilities:
Total liabilities	398	908
Significant Unobservable Inputs (Level 3) | Acquisition consideration payable, non-current
Liabilities:
Total liabilities	549	39
Significant Unobservable Inputs (Level 3) | Derivative liabilities
Liabilities:
Total liabilities		8,800
Cash and cash equivalents
Assets:
Total assets	75,176	22,521
Cash and cash equivalents | Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	75,176	22,521
Cash and cash equivalents | Significant Other Observable Inputs (Level 2)
Assets:
Total assets	0	0
Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Assets:
Total assets	0	0
Restricted cash
Assets:
Total assets	45,000	58,248
Restricted cash | Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	45,000	58,248
Restricted cash | Significant Other Observable Inputs (Level 2)
Assets:
Total assets	0	0
Restricted cash | Significant Unobservable Inputs (Level 3)
Assets:
Total assets	$ 0	$ 0