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Share-based compensation (Tables) | 9 Months Ended
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Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of restricted stock units stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Per Unit
​ |  | Units |  | Fair Value
Outstanding, December 31, 2019 |  | 36,520 | ​ | $ | 12.60
Granted |  | 1,262,308 | ​ |  | 26.00
Restrictions lapsed |  | — | ​ |  | —
Forfeited |  | (7,772) | ​ |  | 26.00
Outstanding, September 30, 2020 |  | 1,291,056 | ​ | $ | 25.62
Service-based options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of stock-option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted‑ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted‑ | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Value
​ |  | Options |  | Price |  | Term (Years) |  | (in thousands)
Outstanding, December 31, 2019 |  | 4,073,286 | ​ | $ | 5.65 |  | 8.1 | ​ | $ | 37,520
Granted |  | — | ​ |  | — |  | ​ | ​ |  | ​
Exercised |  | (33,792) | ​ |  | 5.49 |  | ​ | ​ |  | 498
Forfeitures |  | — | ​ |  | — |  | ​ | ​ |  | ​
Outstanding, September 30, 2020 |  | 4,039,494 | ​ | $ | 5.65 |  | 7.3 | ​ | $ | 129,098
Options exercisable at September 30, 2020 |  | 2,400,693 | ​ | $ | 5.50 |  | 7.2 | ​ | $ | 77,080
Vested or expected to vest at September 30, 2020 |  | 4,039,494 | ​ | $ | 5.65 |  | 7.3 | ​ | $ | 129,098
Schedule of stock based compensation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
​ | ​ | (in thousands)
Cost of revenue: |  | ​ |  |  | ​ |  |  | ​ |  | ​ | ​ | ​
Subscription | ​ | $ | 314 | ​ | $ | 38 | ​ | $ | 390 | ​ | $ | 156
Services | ​ |  | 62 | ​ |  | — | ​ |  | 62 | ​ |  | —
Sales and marketing | ​ |  | 675 | ​ |  | 112 | ​ |  | 897 | ​ |  | 348
Research and development | ​ |  | 523 | ​ |  | 99 | ​ |  | 821 | ​ |  | 284
General and administrative | ​ |  | 754 | ​ |  | 349 | ​ |  | 1,733 | ​ |  | 1,028
​ | ​ | $ | 2,328 | ​ | $ | 598 | ​ | $ | 3,903 | ​ | $ | 1,816
Performance-based options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of stock-option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted‑ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted‑ | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Intrinsic
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Value
​ |  | Options |  | Price |  | Term (Years) |  | (in thousands)
Outstanding, December 31, 2019 |  | 3,687,664 | ​ | $ | 6.75 |  | 8.8 | ​ | $ | 29,908
Granted |  | — | ​ |  | — |  | ​ | ​ |  | ​
Exercised |  | — | ​ |  | — |  | ​ | ​ |  | —
Forfeitures |  | — | ​ |  | — |  | ​ | ​ |  | ​
Outstanding, September 30, 2020 |  | 3,687,664 | ​ | $ | 6.75 |  | 8.0 | ​ | $ | 113,786
Options exercisable at September 30, 2020 |  | — | ​ | $ | — |  | — | ​ | $ | —
Vested or expected to vest at September 30, 2020 |  | — | ​ | $ | — |  | — | ​ | $ | —

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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