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Certain Financial Statement Caption Information - Schedule of Company's Short-Term Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | $ 24,118 | $ 58,173
Unrealized Gains | 1 | 12
Unrealized losses | (1) | (4)
Short-term investments | 24,118 | 58,181
U.S. Treasury Securities Maturing in One Year or Less |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost | 24,118 | 56,218
Unrealized Gains | 1 | 6
Unrealized losses | (1) | (4)
Short-term investments | $ 24,118 | $ 56,220
U.S. Treasury Securities Maturing in One Year or Less | Maximum |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Maturity (in years) | 1 year | 1 year
Certificates of Deposit Maturing in One Year or Less |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Amortized Cost |  | $ 1,955
Unrealized Gains |  | 6
Short-term investments |  | $ 1,961
Certificates of Deposit Maturing in One Year or Less | Maximum |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Maturity (in years) |  | 1 year

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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- Definition Period between issuance and maturity of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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