XML 35 R17.htm IDEA: XBRL DOCUMENT v3.25.3
EQUITY INCENTIVE PLANS​
 9 Months Ended
Sep. 30, 2025
Share-Based Payment Arrangement [Abstract]  
EQUITY INCENTIVE PLANS​ EQUITY INCENTIVE PLANS
Stock-Based Compensation Expense
Stock-based compensation expense recognized for stock options, RSUs and our ESPP is recorded as operating expenses in our condensed statements of operations and comprehensive loss, as follows:
Three Months Ended September 30,Nine Months Ended September 30,
(in thousands)
2025202420252024
Selling, general and administrative$10,400 $6,199 $28,157 $20,305 
Research and development2,342 2,934 8,360 7,213 
Total$12,742 $9,133 $36,517 $27,518 
A summary of our total unrecognized stock-based compensation expense, net of estimated forfeitures, as of September 30, 2025 is as follows:
Unrecognized Compensation Expense
(in thousands)
Average Remaining Vesting Period
(in years)
Stock option grants$54,878 2.67
RSU grants$74,606 3.02
ESPP$276 0.42
Stock Options
A summary of our stock option activity and related information for the nine months ended September 30, 2025 is as follows:
Number of Shares
(in thousands)		Weighted-Average Exercise Price per Share
Balance as of December 31, 202428,085 $5.63 
Options granted7,557 $5.02 
Options exercised(1,642)$2.17 
Options forfeited or canceled(3,857)$6.78 
Balance as of September 30, 202530,143 $5.52 
Exercisable as of September 30, 202517,039 $5.42 
Restricted Stock Units
A summary of our RSUs activity and related information for the nine months ended September 30, 2025 is as follows:
Number of RSUs
(in thousands)
Weighted-Average Grant Date Fair Value per Share
Non-vested restricted stock units as of December 31, 20248,013 $6.59 
Granted10,351 $5.13 
Vested(2,929)$5.84 
Forfeited(1,611)$6.00 
Non-vested restricted stock units as of September 30, 202513,824 $5.72 
Employee Stock Purchase Plan
During the nine months ended September 30, 2025, we issued approximately 0.4 million shares of our common stock under the ESPP. The shares were purchased by employees at an average purchase price of $4.46 per share, resulting in proceeds to us of approximately $1.7 million.
Issuance of Common Stock for Services
During the nine months ended September 30, 2025, we issued 0.1 million shares of our common stock to members of the board of directors who elected to receive stock in lieu of their cash fees under our Non-Employee Director Compensation Program.