Net Loss per Share Attributable to Common Stockholders - Schedule of Antidilutive Securities (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
RSUs
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	3,960,872	1,551,288	3,584,279	2,858,871
PSUs
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	1,208,562	0	407,897	0
RSUs subject to cash-settlement election
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	55,957	0	29,934	0
Customer warrants
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	4,194,876	0	1,644,146	0
Stock options
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	2,358,605	3,680,074	2,675,003	3,881,504
Shares underlying the conversion option in the Notes
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	3,788,048	0	1,276,558	0
Shares issuable pursuant to the 2021 ESPP
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	817,829	995,964	1,048,352	1,227,136
Bonus Plan
Earnings Per Common Share [Line Items]
Antidilutive securities (in shares)	458,736	0	510,684	62,965