Fair Value Measurements - Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Total assets	$ 236,109	$ 56,464
Liabilities:
Total liabilities	34,147	36,347
Derivative liabilities - non-current
Liabilities:
Total liabilities	33,200	35,400
Acquisition consideration payable
Liabilities:
Total liabilities	398	398
Acquisition consideration payable, non-current
Liabilities:
Total liabilities	549	549
Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	236,109	56,464
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
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 Unobservable Inputs (Level 3)
Assets:
Total assets	0	0
Liabilities:
Total liabilities	34,147	36,347
Significant Unobservable Inputs (Level 3) | Derivative liabilities - non-current
Liabilities:
Total liabilities	33,200	35,400
Significant Unobservable Inputs (Level 3) | Acquisition consideration payable
Liabilities:
Total liabilities	398	398
Significant Unobservable Inputs (Level 3) | Acquisition consideration payable, non-current
Liabilities:
Total liabilities	549	549
Cash and cash equivalents
Assets:
Total assets	41,678	56,464
Cash and cash equivalents | Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	41,678	56,464
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
Marketable investment
Assets:
Total assets	194,431
Marketable investment | Quoted Prices in Active Markets (Level 1)
Assets:
Total assets	194,431
Marketable investment | Significant Other Observable Inputs (Level 2)
Assets:
Total assets	0
Marketable investment | Significant Unobservable Inputs (Level 3)
Assets:
Total assets	$ 0