Organization and Description of Business - Additional Information (Detail) $ in Thousands |
3 Months Ended | 9 Months Ended | |||||||
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Sep. 30, 2022
USD ($)
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Jun. 30, 2022
USD ($)
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Mar. 31, 2022
USD ($)
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Sep. 30, 2021
USD ($)
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Jun. 30, 2021
USD ($)
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Mar. 31, 2021
USD ($)
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Sep. 30, 2022
USD ($)
segment
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Sep. 30, 2021
USD ($)
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Dec. 31, 2021
USD ($)
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| Class of Stock [Line Items] | |||||||||
| Number of operating segments | segment | 1 | ||||||||
| Net loss | $ (24,505) | $ (27,094) | $ (27,769) | $ (22,682) | $ (23,222) | $ (17,551) | $ (79,368) | $ (63,455) | |
| Cash flows from operating activities | (65,324) | $ (55,188) | |||||||
| Accumulated deficit | (846,224) | (846,224) | $ (766,856) | ||||||
| Cash and cash equivalents and marketable securities | $ 153,400 | $ 153,400 | |||||||
| X | ||||||||||
- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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