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Fair Value of Financial Assets and Liabilities - (Details) - USD ($) $ / shares in Units, $ in Thousands | Nov. 13, 2020 | Dec. 31, 2020 | Oct. 28, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Marketable securities: |  |  |  |
Warrant to purchase preferred stock converted into warrant to purchase common stock | 7,614 |  | 2,179,487 |
Warrant purchase price (in dollars per share) | $ 3.94 |  | $ 0.0001 |
Conversion of stock shares issued | 6,961 |  |  |
Recurring |  |  |  |
Marketable securities: |  |  |  |
U.S. Treasury obligations |  | $ 180,673 |  | $ 121,140
Total assets |  | 310,512 |  | 156,036
Recurring | Money market funds |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents |  | 119,841 |  | 34,896
Recurring | U.S. Treasury obligations |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents |  | 9,998 |  |
Recurring | Level 1 |  |  |  |
Marketable securities: |  |  |  |
U.S. Treasury obligations |  | 180,673 |  | 121,140
Total assets |  | 310,512 |  | 156,036
Recurring | Level 1 | Money market funds |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents |  | 119,841 |  | $ 34,896
Recurring | Level 1 | U.S. Treasury obligations |  |  |  |
Assets: |  |  |  |
Cash and cash equivalents |  | $ 9,998 |  |

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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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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4313-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4304-108586 + Details
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