XML 52 R18.htm IDEA: XBRL DOCUMENT
v3.19.3

Stock Options (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Schedule of Stock-Based Compensation Expense | The Company recorded employee and nonemployee share-based compensation expense as follows (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Employee |  | $ | 2,328 |  |  | $ | 292 |  |  | $ | 5,905 |  |  | $ | 690 |
Nonemployee |  |  | 163 |  |  |  | - |  |  |  | 414 |  |  |  | 7 |
|  | $ | 2,491 |  |  | $ | 292 |  |  | $ | 6,319 |  |  | $ | 697 |
Schedule of Stock-Based Compensation Expense | Share-based compensation expense related to stock options is included in the following line items in the condensed consolidated statements of operations (in thousands):
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Research and development |  | $ | 1,615 |  |  | $ | 224 |  |  | $ | 4,131 |  |  | $ | 502 |
General and administrative |  |  | 876 |  |  |  | 68 |  |  |  | 2,188 |  |  |  | 195 |
|  | $ | 2,491 |  |  | $ | 292 |  |  | $ | 6,319 |  |  | $ | 697 |
Schedule of Stock Options Valuation Assumptions Using a Black-Scholes Option Pricing Model | The Company granted 2,115,331 stock options for the nine months ended September 30, 2019. The fair value of each stock option grant is estimated using a Black-Scholes option-pricing model on the date of grant as follows:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2019 |  |  | 2019 |
Estimated dividend yield |  |  | 0.00 | % |  |  | 0.00 | %
Weighted-average expected stock price volatility |  |  | 68.13 | % |  |  | 68.16 | %
Weighted-average risk-free interest rate |  |  | 1.74 | % |  |  | 2.08 | %
Expected life of options (in years) |  |  | 6.81 |  |  |  | 6.60 |
Weighted-average fair value per option |  | $ | 7.57 |  |  | $ | 8.20 |
Summary of Activity of Option Plans | The following table summarizes activity in the Company’s stock option plans for the nine months ended September 30, 2019:
|  | Outstanding Option Shares |  |  | Weighted- Average Exercise Price |
Balance as of January 1, 2019 |  |  | 7,763,464 |  |  | $ | 5.00 |
Granted |  |  | 2,115,331 |  |  |  | 12.48 |
Exercised |  |  | (445,408 | ) |  |  | 0.99 |
Forfeited/canceled |  |  | (385,757 | ) |  |  | 10.46 |
Balance as of September 30, 2019 |  |  | 9,047,630 |  |  |  | 6.72 |

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=116856206&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 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=116856206&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=116856206&loc=d3e5047-113901 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
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=116856206&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=116856206&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=116856206&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=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration