Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Name:	us-gaap_RestrictedCashAndCashEquivalents
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fair Value of Financial Instruments - Summary of Investments and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and money market funds	$ 28,451	$ 68,520
Total cash, cash equivalents, and restricted cash	29,467	69,536	$ 23,736	$ 95,401
Total cash, cash equivalents and restricted cash
ASSETS
Cash and money market funds	28,451	68,520
Cash-restricted	1,016	1,016
Total cash, cash equivalents, and restricted cash	29,467	69,536
Cash and money market funds
ASSETS
Cash and money market funds	28,451	68,520
Cash-restricted
ASSETS
Cash-restricted	$ 1,016	$ 1,016