v3.24.3
Stock-Based Compensation
 9 Months Ended
Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Stock-Based Compensation Stock-Based Compensation
Stock-based compensation expense is included in the following line items in the condensed consolidated statements of operations (in thousands):
 Three Months Ended
September 30,		Nine Months Ended
September 30,
 2024202320242023
Cost of hardware and other revenue
$— $3 $2 $3 
Sales and marketing545 854 2,024 2,778 
General and administrative3,077 3,260 9,561 9,873 
Research and development5,572 7,689 20,088 23,769 
Total stock-based compensation expense$9,194 $11,806 $31,675 $36,423 

The following table summarizes the components of non-cash stock-based compensation expense (in thousands):
 Three Months Ended
September 30,		Nine Months Ended
September 30,
 2024202320242023
Stock options$1,006 $1,133 $3,139 $3,116 
Restricted stock units8,141 10,629 28,388 33,170 
Employee stock purchase plan47 44 148 137 
Total stock-based compensation expense$9,194 $11,806 $31,675 $36,423 
Tax windfall benefit / (shortfall) from stock-based awards
$(34)$(111)$1,097 $(802)

We granted 34,000 and 133,500 stock options pursuant to our 2015 Equity Incentive Plan during the three and nine months ended September 30, 2024, respectively, as compared to 4,500 and 197,900 stock options for the same periods in the prior year. There were 11,280 and 154,273 stock options exercised during the three and nine months ended September 30, 2024, respectively, as compared to 38,044 and 121,179 stock options for the same periods in the prior year. There was an aggregate of 134,925 and 464,803 restricted stock units without performance conditions granted to certain of our employees and directors during the three and nine months ended September 30, 2024, respectively, as compared to an aggregate of 117,025 and 303,422 restricted stock units without performance conditions for the same periods in the prior year. There were no restricted stock units with performance conditions granted to our employees during the three and nine months ended September 30, 2024 and 2023. There were 121,087 and 411,870 restricted stock units without performance conditions that vested during the three and nine months ended September 30, 2024, respectively, as compared to 112,310 and 506,260 restricted stock units without performance conditions vested during the same periods in the prior year. There were zero and 33,395 restricted stock units with performance conditions that vested during the three and nine months ended September 30, 2024, respectively, as compared to zero and 39,406 restricted stock units with performance conditions, respectively, vested for the same periods in the prior year.