Fair Value Measurements - Summary of Financial Assets and Liabilities are Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Liabilities
Derivative liability related to loan		$ 494
Fair Value Measurements Recurring
Assets
Total assets	$ 43,631	22,784
Liabilities
Derivative liability related to loan		494
Total liabilities		494
Fair Value Measurements Recurring \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Total assets	43,631	22,784
Fair Value Measurements Recurring \| Significant Unobservable Inputs (Level 3)
Liabilities
Derivative liability related to loan		494
Total liabilities		494
Fair Value Measurements Recurring \| Money Market Funds
Assets
Cash equivalents - money market funds	43,631	22,784
Fair Value Measurements Recurring \| Money Market Funds \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash equivalents - money market funds	$ 43,631	$ 22,784

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (c)
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Fair value of financial and nonfinancial obligations.

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