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Redeemable Common Stock, Common Stock, and Stockholders' Equity (Deficit) - Narrative (Details) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 36 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 22, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Jul. 28, 2022 USD ($) $ / shares shares | Sep. 30, 2023 USD ($) vote $ / shares shares | Sep. 30, 2022 USD ($) shares | Sep. 30, 2023 USD ($) vote $ / shares shares | Sep. 30, 2022 USD ($) shares | Dec. 31, 2019 shares | Dec. 31, 2021 shares | Sep. 20, 2023 $ / shares
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Redeemable common stock issued (in shares) |  |  |  |  |  |  |  |  | 64,046,223 |
Preferred stock, shares authorized (in shares) |  | 0 |  | 100,000,000 |  | 100,000,000 |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 0 |  | 0 |  | 0 |  |  |  |
Warrants, exercise price (in dollars per share) | $ / shares |  | $ 0.01 |  | $ 0.01 |  | $ 0.01 |  |  |  |
Warrants vested (in shares) |  |  |  | 4,526,162 | 3,935,793 | 5,706,904 | 3,935,793 |  |  |
Warrants granted (in shares) |  |  |  |  | 15,743,174 | 0 | 15,743,174 |  |  |
Restricted common stock, issued (in shares) |  |  |  |  |  |  |  | 142,908 |  |
Restricted common stock liability | $ |  | $ 100 |  |  |  |  |  |  |  |
Payments of stock issuance costs | $ | $ 7,600 |  |  | $ 25,278 | $ 307 | $ 25,278 | $ 307 |  |  |
Restricted stock outstanding |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Aggregate fair value of restricted common stock vested | $ |  |  |  |  |  | $ 700 | $ 900 |  |  |
Series A Common Stock |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Number of votes per common share | vote |  |  |  | 1 |  | 1 |  |  |  |
Series A Common Stock | Conversion of Redeemable Common Stock Into Series B Common Stock |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Conversion of common stock (in shares) | 64,046,223 |  |  |  |  |  |  |  |  |
Series B Common Stock |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Number of votes per common share | vote |  |  |  | 10 |  | 10 |  |  |  |
Number of shares convertible (in shares) |  |  |  | 1 |  | 1 |  |  |  |
Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum number of common stock shares in which warrants may be converted (in shares) |  |  | 15,743,174 |  |  |  |  |  |  |
Warrants, exercise price (in dollars per share) | $ / shares |  |  | $ 0.01 |  |  |  |  |  |  |
Term of warrants (in years) |  |  | 10 years |  |  |  |  |  |  |
IPO |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance price per share (in dollars per share) | $ / shares | $ 30.00 |  |  |  |  |  |  |  |  | $ 30.00
Shares issued under purchase agreement (in shares) | 19,200,000 |  |  |  |  |  |  |  |  |
Private Placement | Shopify |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance price per share (in dollars per share) | $ / shares |  |  | $ 33.88 |  |  |  |  |  |  |
Shares issued under purchase agreement (in shares) |  |  | 2,951,846 |  |  |  |  |  |  |
Investment Option |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of common stock | $ |  |  | $ 30,600 |  |  |  |  |  |  |
Investment Option | Shopify |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Issuance price per share (in dollars per share) | $ / shares |  |  | $ 88.93 |  |  |  |  |  |  |
Additional shares available for purchase (in shares) |  |  | 15,743,174 |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuance of common stock | $ |  |  | $ 69,400 |  |  |  |  |  |  |
Common Stock and Investment Option |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of stock | $ |  |  | 100,000 |  |  |  |  |  |  |
Payments of stock issuance costs | $ |  |  | $ 400 |  |  |  |  |  |  |
Class of Warrant or Right, Vesting Period One | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants, vesting percentage | 0.25 |  | 0.25 |  |  |  |  |  |  |
Class of Warrant or Right, Vesting Periods Two Through Twenty-One | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants, vesting percentage |  |  | 0.75 |  |  |  |  |  |  |
Dividend yield | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants outstanding, measurement input |  |  |  | 0 |  | 0 |  |  |  |
Contractual term | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants outstanding, measurement input |  |  | 10 |  |  |  |  |  |  |
Volatility | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants outstanding, measurement input |  |  |  | 0.5500 |  | 0.5500 |  |  |  |
Risk-free rate | Shopify | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants outstanding, measurement input |  |  |  | 0.0285 |  | 0.0285 |  |  |  |

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