XML 62 R37.htm IDEA: XBRL DOCUMENT v3.24.1

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expenses Related to Statement of Operations

The following table presents stock-based compensation included on the consolidated statements of operations (in thousands):

			Year Ended December 31,
			2023						2022						2021
Stock-based compensation expense:
Stock options			$	13,884					$	13,280					$	11,623
RSUs			35,279						26,899						45,558
			$	49,163					$	40,179					$	57,181
Stock-based compensation expense in operating expenses:
Research and development			$	17,341					$	11,669					$	18,819
Selling, general and administrative			31,822						28,510						38,362
			$	49,163					$	40,179					$	57,181

Schedule of Stock Option Activity and Related Information under Equity Plans

The following table summarizes stock option activity and related information for the year ended December 31, 2023:

			Number of Options						Weighted- Average Exercise Price						Aggregate Intrinsic Value (in thousands)						Weighted- Average Remaining Contractual Life (in years)
Outstanding as of December 31, 2022			9,262,926						$	9.87					$	4,848					7.2
Granted			949,578						$	2.99
Exercised			(184,362)						$	1.59
Expired/forfeited			(207,707)						$	5.53
Outstanding as of December 31, 2023			9,820,435						$	9.46					$	6,046					6.6
Vested and exercisable as of December 31, 2023			5,867,252						$	11.54					$	4,118					5.4

Schedule of Weighted Average Fair Value of Options Under Black-Scholes Option Pricing Model

The fair value of stock options issued was estimated at the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

			Year Ended December 31,
			2023						2022						2021
Expected term			5.50 years						5.69 years						5.90 years
Risk-free interest rate			4.0		%				2.6		%				0.7		%
Expected volatility			116.2		%				101.8		%				101.0		%
Dividend yield			—		%				—		%				—		%
Weighted-average grant date fair value			$2.53						$4.20						$16.80

Schedule of RSU Activity under Equity Plans

The following table summarizes RSU activity during the year ended December 31, 2023:

			Number of Units						Weighted- Average Grant Date Fair Value
Nonvested balance as of December 31, 2022			6,551,388						$	18.27
Granted			6,407,432						$	1.72
Vested			(4,545,644)						$	7.33
Forfeited/canceled			(909,197)						$	7.99
Nonvested balance as of December 31, 2023			7,503,979						$	12.01

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 the changes in outstanding nonvested restricted stock shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Subparagraph (c)
-Paragraph 2
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_NonvestedRestrictedStockSharesActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (e)
-SubTopic 10
-Topic 718
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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
-Topic 718
-SubTopic 10
-Subparagraph (f)(2)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration