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Equity incentive plans - Narrative (Details) |  |  | 12 Months Ended |
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Sep. 28, 2021 shares | Aug. 24, 2021 $ / shares shares | Dec. 31, 2021 USD ($) period award $ / shares shares | Dec. 31, 2020 USD ($) award $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 installment shares | Oct. 29, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Weighted average grant date fair value, options (in USD per share) | $ / shares |  |  | $ 16.01 | $ 5.48 | $ 1.66 |  |
Aggregate intrinsic value of options exercised in period |  |  | $ 59,700,000 | $ 34,800,000 | $ 11,000,000 |  |
Unrecognized compensation costs, options |  |  | $ 95,800,000 |  |  |  |
Total shares of common stock reserved (in shares) | shares |  |  | 34,559,618 | 108,254,073 |  |  |
Stock-based compensation |  |  | $ 34,680,000 | $ 31,618,000 | 8,963,000 |  |
Stock-based compensation capitalized as a software |  |  | 2,500,000 | $ 700,000 | $ 300,000 |  |
Stock-based compensation capitalized as a cloud computing costs |  |  | $ 100,000 |  |  |  |
Amended and Restated 2010 Equity Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Additional shares authorized for issuance (in shares) | shares | 850,000 |  |  |  |  |  |
Number of shares authorized for issuance (in shares) | shares | 44,340,706 |  |  |  |  |  |
2021 Stock incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares reserved for future issuance (in shares) | shares |  |  | 13,800,000 |  |  |  |
Annual percentage increase, term |  |  | 0.05 |  |  |  |
Granted (in shares) | shares |  |  | 5,529,439 |  |  |  |
Tender Offer to Sell Common Stock to an Investor |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares sold in transaction (in shares) | shares |  |  | 236,086 |  | 300,000 |  |
Sale of stock, term, less than (in USD per share) | $ / shares |  |  | $ 23.75 |  | $ 10.00 |  |
Stock-based compensation |  |  | $ 1,600,000 |  | $ 2,100,000 |  |
Tender Offer to Sell Vested Stock Options and Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares sold in transaction (in shares) | shares |  |  |  | 891,265 |  |  |
Sale of stock, term, less than (in USD per share) | $ / shares |  |  |  | $ 11.22 |  |  |
Stock-based compensation |  |  |  | $ 3,500,000 |  |  |
Other Equity Transaction |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock-based compensation |  |  | $ 4,000,000 | $ 17,900,000 | $ 1,700,000 |  |
Stock Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Contractual term (in years) |  |  | 10 years |  |  |  |
Award vesting period (in years) |  |  | 4 years |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  |  | 2 years 6 months |  |  |  |
Stock Appreciation Rights |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Contractual term (in years) |  |  | 10 years |  |  |  |
Award vesting period (in years) |  |  | 4 years |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  |  | 2 years 3 months 18 days |  |  |  |
Weighted average grant date fair value (in USD per share) | $ / shares |  |  | $ 22.47 | $ 6.04 | $ 5.00 |  |
Unrecognized compensation costs, excluding options |  |  | $ 700,000 |  |  |  |
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  |  | 3 years 10 months 24 days |  |  |  |
Unrecognized compensation costs, excluding options |  |  | $ 68,600,000 |  |  |  |
Restricted stock issued for business combination, grant date fair value (in dollars per share) | $ / shares |  |  | $ 27.64 | $ 0 |  |  |
Restricted Stock Units (RSUs) | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period (in years) |  |  | 3 years |  |  |  |
Restricted Stock Units (RSUs) | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting period (in years) |  |  | 4 years |  |  |  |
Performance-Based Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Contractual term (in years) |  |  | 10 years |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  |  | 9 months 18 days |  |  |  |
Number of Performance-Based Awards outstanding | award |  |  | 2 | 2 |  |  |
Granted (in shares) | shares |  |  |  | 350,000 |  | 50,000 |
Number of equal monthly installments | installment |  |  |  |  |  | 48 |
Unrecognized compensation costs |  |  | $ 600,000 |  |  |  |
Performance-Based Awards | Amended and Restated 2010 Equity Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) | shares |  |  | 0 |  |  |  |
Performance-Based Awards | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 50.00% |  |  |
Required annual recurring revenues, vesting term |  |  |  | $ 230,000,000 |  |  |
Performance-Based Awards | Share-based Payment Arrangement, Tranche Two |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award vesting rights, percentage |  |  |  | 50.00% |  |  |
Required annual recurring revenues, vesting term |  |  |  | $ 330,000,000 |  |  |
Employee Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  |  | 1 year 10 months 24 days |  |  |  |
Unrecognized compensation costs, excluding options |  |  | $ 6,600,000 |  |  |  |
Total shares of common stock reserved (in shares) | shares |  |  |  |  |  |  | 2,800,000
Percent of outstanding shares |  |  | 1.00% |  |  |  |
ESPP discount percentage from market price, beginning of purchase period |  |  | 15.00% |  |  |  |
Consecutive offering period |  |  | 24 months |  |  |  |
Number of purchase periods | period |  |  | 4 |  |  |  |
Purchase period |  |  | 6 months |  |  |  |
ESPP purchase price of common stock, percent of market price |  |  | 85.00% |  |  |  |
Restricted Stock | CorpU |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Unrecognized compensation costs, period for recognition (in years) |  | 3 years | 2 years 7 months 6 days |  |  |  |
Unrecognized compensation costs, excluding options |  |  | $ 1,800,000 |  |  |  |
Stock-based compensation |  |  | $ 200,000 |  |  |  |
Restricted stock issued for business combination (in shares) | shares |  | 61,300 |  |  |  |  |
Restricted stock issued for business combination, grant date fair value (in dollars per share) | $ / shares |  | $ 34.14 |  |  |  |  |

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