Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Assets:
Assets fair value	$ 136,085	$ 94,798
Liabilities:
Liabilities fair value	255	358
Certificates of Deposit - Restricted Cash
Assets:
Assets fair value	1,001	1,001
Money Market Mutual Funds
Assets:
Assets fair value	135,084	93,792
Foreign Currency Forward Contracts
Assets:
Assets fair value		5
Level 1
Assets:
Assets fair value	135,084	93,792
Level 1 | Money Market Mutual Funds
Assets:
Assets fair value	135,084	93,792
Level 2
Assets:
Assets fair value	1,001	1,006
Level 2 | Certificates of Deposit - Restricted Cash
Assets:
Assets fair value	1,001	1,001
Level 2 | Foreign Currency Forward Contracts
Assets:
Assets fair value		5
Level 3
Liabilities:
Liabilities fair value	255	358
Stock Appreciation Rights ("SARs") | Share Based Compensation Liability
Liabilities:
Liabilities fair value	255	358
Stock Appreciation Rights ("SARs") | Level 3 | Share Based Compensation Liability
Liabilities:
Liabilities fair value	$ 255	$ 358