Stock-based Compensation |
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Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Stock-based Compensation | 9. Stock-based Compensation In January 2022, the Board of Directors authorized an additional 1,713,246 shares to be issued under the 2015 Equity Incentive Plan (the 2015 Plan). As of September 30, 2022, the total number of shares of common stock authorized for issuance under the 2015 Plan and the 2014 Stock Plan (the 2014 Plan) was 15,625,200, of which 2,691,957 remained available for future grants under the 2015 Plan. Stock-based Compensation Expense The Company’s stock-based compensation expense by award type was as follows (in thousands):
As of September 30, 2022, the Company had $72.9 million of unrecognized stock-based compensation expense related to stock options, restricted stock units and the 2015 Employee Stock Purchase Plan (the 2015 ESPP), which is expected to be recognized over a weighted-average period of 2.4 years. The Company recorded aggregate stock-based compensation expense in the consolidated statements of operations and comprehensive loss as follows (in thousands):
Stock Options The following table summarizes stock option activity under the 2014 Plan and 2015 Plan (in thousands, except per share data):
(a) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying options and the fair value of the common stock for the options that were in the money at the dates reported. The weighted-average grant date fair value per share of options granted during the nine months ended September 30, 2022 was $19.50. During the nine months ended September 30, 2022, the total number of stock options exercised was 328,529, resulting in total proceeds of $2.8 million. The total intrinsic value of options exercised during the nine months ended September 30, 2022 was $6.8 million. Restricted Stock Units The following table summarizes restricted stock unit activity under the 2015 Plan (in thousands, except per share data):
The total intrinsic value of restricted stock units vested during the nine months ended September 30, 2022 was $2.1 million. No restricted stock units vested during the nine months ended September 30, 2021. Employee Stock Purchase Plan In January 2022, the Board of Directors authorized an additional 428,311 shares to be issued under the 2015 ESPP. As of September 30, 2022, the total number of shares of common stock authorized for issuance under the 2015 ESPP was 1,426,994, of which 1,121,752 remained available for future issuance. During the nine months ended September 30, 2022, 75,733 shares of common stock were issued under the 2015 ESPP. |