Summary of Significant Accounting Policies - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Equity securities	$ 7,619
Debt securities	1,313
Assets measured at fair value on a recurring basis	8,932
Liabilities:
Liabilities measured at fair value on a recurring basis	4,533	$ 4,986
Liability Classified Equity Award
Liabilities:
Liabilities measured at fair value on a recurring basis	4,533	4,108
Foreign Currency Forward Contract
Liabilities:
Liabilities measured at fair value on a recurring basis		878
Level 1
Assets:
Equity securities	7,619
Assets measured at fair value on a recurring basis	7,619
Level 2
Assets:
Debt securities	1,313
Assets measured at fair value on a recurring basis	1,313
Liabilities:
Liabilities measured at fair value on a recurring basis		878
Level 2 | Foreign Currency Forward Contract
Liabilities:
Liabilities measured at fair value on a recurring basis		878
Level 3
Liabilities:
Liabilities measured at fair value on a recurring basis	4,533	4,108
Level 3 | Liability Classified Equity Award
Liabilities:
Liabilities measured at fair value on a recurring basis	$ 4,533	$ 4,108