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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock Option Activity The following table summarizes the activity for all stock options under all of the Company’s equity incentive plans for the nine months ended September 30, 2023 (shares and aggregate intrinsic value in thousands):
Number of OptionsWeighted Average Exercise PriceWeighted Average Remaining Contractual LifeAggregate Intrinsic Value
Outstanding at December 31, 20225,217 $16.08 5.68$58,784 
Granted— — 
Exercised(534)6.75 
Canceled(106)30.09 
Outstanding at September 30, 20234,577 $16.85 4.99$14,182 
Options vested and exercisable at September 30, 20233,764 $13.77 4.30$13,991 
Schedule of Activity for all Restricted Stock Units (RSUs) The following table summarizes the activity for all restricted stock units (“RSUs”) under all of the Company’s equity incentive plans for the nine months ended September 30, 2023 (shares in thousands):
Number of AwardsWeighted Average Grant Date Fair Value
Unvested balance at December 31, 20224,542 $31.60 
Granted6,886 19.63 
Issued(2,202)27.67 
Canceled / forfeited(745)27.77 
Unvested balance at September 30, 20238,481 $23.25 
Schedule of Stock-Based Compensation Expense The Company recognized stock-based compensation expense, including ESPP expenses, in the consolidated statements of operations as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Cost of customer agreements and incentives$2,335 $1,776 $6,224 $7,132 
Cost of solar energy systems and product sales
1,153 1,741 4,415 6,755 
Sales and marketing14,096 10,418 43,808 48,042 
Research and development405 464 1,299 2,160 
General and administration9,734 8,431 28,480 24,613 
Total$27,723 $22,830 $84,226 $88,702