XML 29 R17.htm IDEA: XBRL DOCUMENT
v3.22.1

Equity Incentive Plans | 3 Months Ended
--- | ---
Mar. 31, 2022
Share-based Payment Arrangement [Abstract] |
Equity Incentive Plans | EQUITY INCENTIVE PLANS Stock-Based Compensation Stock-based compensation expense recognized for stock options, restricted stock units ("RSUs"), performance-based restricted stock units ("PRSUs") and our employee stock purchase program (the "ESPP") are recorded as operating expenses in our condensed statements of operations and comprehensive loss, as follows (in thousands):
| Three Months Ended March 31, |  |
| 2022 |  | 2021 |  |  |  |
Research and development | $ | 1,214 |  |  | $ | 1,092 |  |  |  |  |
Selling, general and administrative | 2,508 |  |  | 1,995 |  |  |  |  |
Total | $ | 3,722 |  |  | $ | 3,087 |  |  |  |  |
As of March 31, 2022, our total unrecognized stock-based compensation expense, net of estimated forfeitures, and average remaining vesting period, included the following (dollars in thousands):
| Unrecognized Compensation Expense |  | Average Remaining Vesting Period (Years)
Stock option grants | $ | 14,865 |  |  | 3.0
RSU grants | $ | 4,894 |  |  | 1.3
ESPP | $ | 53 |  |  | 0.8
Stock Options A summary of our stock option activity and related information for the three months ended March 31, 2022 is as follows (in thousands, except dollar amounts):
| Number of Shares |  | Weighted-Average Exercise Price per Share
Balance at December 31, 2021 | 10,417 |  |  | $ | 7.00 |
Options granted | 3,535 |  |  | $ | 0.98 |
Options exercised | — |  |  | $ | — |
Options forfeited or canceled | (1,006) |  |  | $ | 7.18 |
Balance at March 31, 2022 | 12,946 |  |  | $ | 5.34 |
Exercisable at March 31, 2022 | 6,476 |  |  | $ | 7.16 |
Restricted Stock Units A summary of our RSUs activity and related information for the three months ended March 31, 2022 is as follows (in thousands, except dollar amounts):
| Number of RSUs |  | Weighted-Average Grant Date Fair Value Per Share
Non-vested restricted stock units at December 31, 2021 | 3,529 |  |  | $ | 2.04 |
Granted | 1,120 |  |  | $ | 0.98 |
Vested | (113) |  |  | $ | 3.62 |
Forfeited | (88) |  |  | $ | 2.02 |
Non-vested restricted stock units at March 31, 2022 | 4,448 |  |  | $ | 1.73 |
Employee Stock Purchase Plan In February 2022, we sold approximately 0.1 million shares of our common stock under the ESPP. The shares were purchased by employees at a purchase price of $0.65 per share resulting in proceeds to us of approximately $0.1 million. Issuance of Common Stock for Services Under Our Amended and Restated Non-Employee Director Compensation Program, members of our board of directors may elect to receive shares of our stock in lieu of their cash fees. During the three months ended March 31, 2022, we issued no shares of our common stock to members of the board of directors in accordance with the program.

X
- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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