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Stockholders' Equity and Redeemable Convertible Preferred Stock (Details) - Redeemable Convertible Preferred Stock $ / shares in Units, $ in Thousands | Mar. 31, 2025 USD ($) $ / shares shares
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Class of Stock [Line Items] |
Temporary equity, shares authorized (in shares) | 65,408,000
Temporary equity, Shares outstanding | 48,446,000
Temporary equity, Carrying value | $ | $ 887,074
Series Seed Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 2,023,000
Temporary equity, Shares outstanding | 2,023,000
Temporary equity, Carrying value | $ | $ 2,950
Series Seed-1 Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 3,273,000
Temporary equity, Shares outstanding | 3,273,000
Temporary equity, Carrying value | $ | $ 204,454
Series A Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 6,005,000
Temporary equity, Shares outstanding | 6,005,000
Temporary equity, Carrying value | $ | $ 74,913
Series B Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 5,869,000
Temporary equity, Shares outstanding | 5,869,000
Temporary equity, Carrying value | $ | $ 72,096
Series C Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 11,159,000
Temporary equity, Shares outstanding | 11,159
Temporary equity, Carrying value | $ | $ 219,450
Series M Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 2,812,000
Temporary equity, Shares outstanding | 2,812,000
Temporary equity, Carrying value | $ | $ 10,990
Series J Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 922,000
Temporary equity, Shares outstanding | 0
Temporary equity, Carrying value | $ | $ 0
Series D-1 Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 26,594,000
Temporary equity, Shares outstanding | 17,305,000
Temporary equity, Carrying value | $ | $ 302,221
Series D-2 Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 1,241,000
Temporary equity, Shares outstanding | 0
Temporary equity, Carrying value | $ | $ 0
Series D-3 Preferred Stock |
Class of Stock [Line Items] |
Temporary equity, par or stated value per share | $ / shares | $ 0.0001
Temporary equity, shares authorized (in shares) | 5,510,000
Temporary equity, Shares outstanding | 0
Temporary equity, Carrying value | $ | $ 0

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