XML 56 R29.htm IDEA: XBRL DOCUMENT v3.20.4

Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Equity-Based Compensation

Summary of allocation of equity-based compensation

The Company recorded equity-based compensation expense related to all equity-based awards, which was allocated as follows in the consolidated statements of operations and comprehensive loss for the years ended December 31, 2020 and 2019 (in thousands):

​	​	​	​	​	​	​
​	​	Year Ended
​	​	December 31,
​		2020			2019
Research and development expense	​	$	3,554	​	$	2,425
General and administrative expense	​		7,621	​		5,547
​	​	$	11,175	​	$	7,972

Summary of restricted common stock activity

​

​	​	​	​	​	​
​		​		Weighted
​	​	​	​	Average Fair
​	​	​	​	Value per Share
​		Number of Shares		at Issuance
Restricted common stock as of December 31, 2019		302,360	​	$	5.77
Granted		—	​	$	—
Vested		(202,381)	​	$	5.77
Forfeited		(42,010)	​	$	5.77
Restricted common stock as of December 31, 2020		57,969	​	$	5.77

Summary of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted	​	​	​
​	​	​	​	Weighted		​	Average	​	​	​
​	​	Number of	​	Average		​	Remaining	​	Aggregate
​		Shares		Exercise Price			Contractual Term		Intrinsic Value
​	​	​	​	​	​	​	(in years)	​	(in thousands)
Outstanding as of December 31, 2019		2,401,382	​	$	12.63		8.36	​	$	6,523
Granted		2,388,340	​	$	16.01	​	​	​	​	​
Exercised	​	(676,649)	​	$	10.78	​	​	​	​	​
Cancelled		(433,142)	​	$	14.38	​	​	​	​	​
Outstanding as of December 31, 2020		3,679,931	​	$	14.96	​	8.01	​	$	123,600
Options exercisable as of December 31, 2020		900,142	​	$	13.72	​	7.76	​	$	31,332

Schedule of fair value assumptions

​

​	​	​	​	​
​	Year Ended			​
​	December 31,			​
​	2020		2019	​
Risk-free interest rate	0.92	%	2.31	%
Expected dividend yield	0.0	%	0.0	%
Expected term (years to liquidity)	6.21	​	6.20	​
Expected volatility	82.09	%	79.50	%

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 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

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=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

X

- Definition

Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration