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Summary of Significant Accounting Policies - Summary of Fair Value Measurement Financial Asset and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Assets [Abstract] |  |
Cash and cash equivalents | $ 52,000 | $ 73,200
Securities | 91,400 | 89,284
Total assets measured at fair value | 143,403 | 162,506
Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 49,004 | 46,149
Government-sponsored enterprises |  |
Assets [Abstract] |  |
Securities |  | 13,222
U.S Treasury securities |  |
Assets [Abstract] |  |
Securities | 60,623 |
Corporate debt securities |  |
Assets [Abstract] |  |
Securities | 33,776 | 103,135
Quoted Prices in Active Markets for Identical Assets, Level 1 |  |
Assets [Abstract] |  |
Total assets measured at fair value | 49,004 | 46,149
Quoted Prices in Active Markets for Identical Assets, Level 1 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 49,004 | 46,149
Quoted Prices in Active Markets for Identical Assets, Level 1 | Government-sponsored enterprises |  |
Assets [Abstract] |  |
Securities |  | 0
Quoted Prices in Active Markets for Identical Assets, Level 1 | U.S Treasury securities |  |
Assets [Abstract] |  |
Securities | 0 |
Quoted Prices in Active Markets for Identical Assets, Level 1 | Corporate debt securities |  |
Assets [Abstract] |  |
Securities | 0 | 0
Significant Other Observable Inputs, Level 2 |  |
Assets [Abstract] |  |
Total assets measured at fair value | 94,399 | 116,357
Significant Other Observable Inputs, Level 2 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Significant Other Observable Inputs, Level 2 | Government-sponsored enterprises |  |
Assets [Abstract] |  |
Securities |  | 13,222
Significant Other Observable Inputs, Level 2 | U.S Treasury securities |  |
Assets [Abstract] |  |
Securities | 60,623 |
Significant Other Observable Inputs, Level 2 | Corporate debt securities |  |
Assets [Abstract] |  |
Securities | 33,776 | 103,135
Significant Unobservable Inputs, Level 3 |  |
Assets [Abstract] |  |
Total assets measured at fair value | 0 | 0
Significant Unobservable Inputs, Level 3 | Money market funds |  |
Assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Significant Unobservable Inputs, Level 3 | Government-sponsored enterprises |  |
Assets [Abstract] |  |
Securities |  | 0
Significant Unobservable Inputs, Level 3 | U.S Treasury securities |  |
Assets [Abstract] |  |
Securities | 0 |
Significant Unobservable Inputs, Level 3 | Corporate debt securities |  |
Assets [Abstract] |  |
Securities | $ 0 | $ 0

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition 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. + References No definition available. + Details
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