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Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Redeemable convertible preferred stock, beginning balance (in shares) at Dec. 31, 2020 | 85,391,338 |  |  |  |
Redeemable convertible preferred stock, beginning balance at Dec. 31, 2020 | $ 274,104 |  |  |  |
Increase (Decrease) in Temporary Equity [Roll Forward] |  |  |  |  |
Exercise of Series A-1 redeemable convertible preferred stock warrants (in shares) | 12,595 |  |  |  |
Exercise of Series A-1 redeemable convertible preferred stock warrants | $ 163 |  |  |  |
Redeemable convertible preferred stock, ending balance balance (in shares) at Sep. 30, 2021 | 85,403,933 |  |  |  |
Redeemable convertible preferred stock, ending balance at Sep. 30, 2021 | $ 274,267 |  |  |  |
Beginning balance (in shares) at Dec. 31, 2020 |  | 35,627,503 |  |  |
Beginning balance at Dec. 31, 2020 | (260,685) | $ 0 | $ 117,818 | $ 0 | $ (378,503)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation | 24,511 |  | 24,511 |  |
Exercise of stock options (in shares) |  | 2,312,423 |  |  |
Exercise of stock options | 8,008 |  | 8,008 |  |
Vesting of restricted stock units (in shares) |  | 61,300 |  |  |
Net loss | (38,642) |  |  |  | (38,642)
Ending balance (in shares) at Sep. 30, 2021 |  | 38,001,226 |  |  |
Ending balance at Sep. 30, 2021 | $ (266,808) | $ 0 | 150,337 | 0 | (417,145)
Redeemable convertible preferred stock, beginning balance (in shares) at Jun. 30, 2021 | 85,403,933 |  |  |  |
Redeemable convertible preferred stock, beginning balance at Jun. 30, 2021 | $ 274,267 |  |  |  |
Redeemable convertible preferred stock, ending balance balance (in shares) at Sep. 30, 2021 | 85,403,933 |  |  |  |
Redeemable convertible preferred stock, ending balance at Sep. 30, 2021 | $ 274,267 |  |  |  |
Beginning balance (in shares) at Jun. 30, 2021 |  | 37,523,533 |  |  |
Beginning balance at Jun. 30, 2021 | (266,771) | $ 0 | 141,112 | 0 | (407,883)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation | 7,578 |  | 7,578 |  |
Exercise of stock options (in shares) |  | 416,393 |  |  |
Exercise of stock options | 1,647 |  | 1,647 |  |
Vesting of restricted stock units (in shares) |  | 61,300 |  |  |
Net loss | (9,262) |  |  |  | (9,262)
Ending balance (in shares) at Sep. 30, 2021 |  | 38,001,226 |  |  |
Ending balance at Sep. 30, 2021 | $ (266,808) | $ 0 | 150,337 | 0 | (417,145)
Redeemable convertible preferred stock, beginning balance (in shares) at Dec. 31, 2021 | 0 |  |  |  |
Redeemable convertible preferred stock, beginning balance at Dec. 31, 2021 | $ 0 |  |  |  |
Redeemable convertible preferred stock, ending balance balance (in shares) at Sep. 30, 2022 | 0 |  |  |  |
Redeemable convertible preferred stock, ending balance at Sep. 30, 2022 | $ 0 |  |  |  |
Beginning balance (in shares) at Dec. 31, 2021 |  | 139,164,693 |  |  |
Beginning balance at Dec. 31, 2021 | 389,700 | $ 1 | 848,229 | (1) | (458,529)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation | 57,457 |  | 57,457 |  |
Exercise of stock options (in shares) |  | 1,273,968 |  |  |
Exercise of stock options | 5,653 |  | 5,653 |  |
Vesting of restricted stock units (in shares) |  | 294,759 |  |  |
Vesting of restricted stock units | 67 |  | 67 |  |
Reclassification of stock appreciation rights | 62 |  | 62 |  |
Other comprehensive loss | (264) |  |  | (264) |
Issuances of common stock under employee stock purchase plan (in shares) |  | 526,754 |  |  |
Reclassification of stock appreciation rights | 5,563 |  | 5,563 |  |
Net loss | (101,722) |  |  |  | (101,722)
Ending balance (in shares) at Sep. 30, 2022 |  | 141,260,174 |  |  |
Ending balance at Sep. 30, 2022 | $ 356,516 | $ 1 | 917,031 | (265) | (560,251)
Redeemable convertible preferred stock, beginning balance (in shares) at Jun. 30, 2022 | 0 |  |  |  |
Redeemable convertible preferred stock, beginning balance at Jun. 30, 2022 | $ 0 |  |  |  |
Redeemable convertible preferred stock, ending balance balance (in shares) at Sep. 30, 2022 | 0 |  |  |  |
Redeemable convertible preferred stock, ending balance at Sep. 30, 2022 | $ 0 |  |  |  |
Beginning balance (in shares) at Jun. 30, 2022 |  | 140,622,937 |  |  |
Beginning balance at Jun. 30, 2022 | 374,946 | $ 1 | 888,522 | (19) | (513,558)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation | 26,428 |  | 26,428 |  |
Exercise of stock options (in shares) |  | 427,684 |  |  |
Exercise of stock options | 2,019 |  | 2,019 |  |
Vesting of restricted stock units (in shares) |  | 209,553 |  |  |
Vesting of restricted stock units | 0 |  |  |  |
Reclassification of stock appreciation rights | 62 |  | 62 |  |
Other comprehensive loss | (246) |  |  | (246) |
Net loss | (46,693) |  |  |  | (46,693)
Ending balance (in shares) at Sep. 30, 2022 |  | 141,260,174 |  |  |
Ending balance at Sep. 30, 2022 | $ 356,516 | $ 1 | $ 917,031 | $ (265) | $ (560,251)

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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1A -Subparagraph (SX 210.13-01(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(5)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(i)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section S99 -Paragraph 1B -Subparagraph (SX 210.13-02(a)(4)(iv)) -URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756 + Details
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