XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.20.2

Share-based compensation (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Share-based compensation |
Schedule of share based compensation expense | The Company recorded share‑based compensation expense in the following expense categories of its condensed consolidated statements of operations and comprehensive loss (in thousands):
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2020 |  | 2019 |  | 2020 |  | 2019
Research and development expenses |  | $ | 668 |  | $ | 417 |  | $ | 1,863 |  | $ | 816
General and administrative expenses |  |  | 842 |  |  | 402 |  |  | 3,087 |  |  | 1,184
|  | $ | 1,510 |  | $ | 819 |  | $ | 4,950 |  | $ | 2,000
Schedule of share option activity |
|  |  |  |  |  |  | Weighted |  |  |
|  |  |  | Weighted |  | Average |  | Aggregate
|  | Number of |  | Average |  | Contractual |  | Intrinsic
|  | Shares |  | Exercise Price |  | Term |  | Value
|  |  |  |  |  |  | (in years) |  | (in thousands)
Outstanding as of December 31, 2019 |  | 2,634,346 |  | $ | 9.57 |  | 9.04 |  | $ | 6,107
Granted |  | 1,319,484 |  |  | 11.69 |  | — |  |  | —
Exercised |  | (18,554) |  |  | 5.33 |  | — |  |  | —
Forfeited |  | (155,491) |  |  | 10.69 |  | — |  |  | —
Outstanding as of September 30, 2020 |  | 3,779,785 |  | $ | 10.24 |  | 8.76 |  | $ | 33,340
Vested and expected to vest as of September 30, 2020 |  | 3,779,785 |  | $ | 10.24 |  | 8.76 |  | $ | 33,340
Options exercisable as of September 30, 2020 |  | 1,377,257 |  | $ | 8.39 |  | 8.08 |  | $ | 15,580
Schedule of assumptions used to determine the fair value of share options granted |
|  | Three |  | Nine |
|  | Months |  | Months |
|  | Ended |  | Ended |
|  | September 30, |  | September 30, |
|  | 2020 |  | 2019 |  | 2020 |  | 2019 |
Risk-free interest rate |  | 0.3 | % | 1.7 | % | 1.4 | % | 2.2 | %
Expected volatility |  | 74.1 | % | 77.0 | % | 74.1 | % | 78.3 | %
Expected dividend yield |  | — |  | — |  | — |  | — |
Expected term (in years) |  | 6.1 |  | 6.0 |  | 6.0 |  | 5.9 |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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 + Details
Name: | us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration