Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

The following table summarizes stock option activity for the six months ended June 30, 2022 (in thousands, except per share amounts):


	Options Outstanding	Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Contractual Life (years)	Aggregate Intrinsic Value
Balance as of December 31, 2021	349,952	$	7.81	9.06	$	3,638,685

Options exercised	(11,434)	4.16		—	—
Options canceled and forfeited	(1,942)	4.93		—	—
Balance as of June 30, 2022	336,576	$	7.95	8.74	$	750,129
Options vested and exercisable as of June 30, 2022	175,943	$	5.46	7.68	$	676,872

The following table summarizes the RSU activity for the six months ended June 30, 2022 (in thousands, except per share amounts):


	RSUs Outstanding	Weighted Average Grant Date Fair Value per Share
Balance as of December 31, 2021	153,749	$	9.56
RSUs granted	11,209	13.96
RSUs vested and converted to shares	(23,833)	8.59
RSUs canceled	(4,415)	9.07
Balance as of June 30, 2022	136,710	$	10.11

Total stock-based compensation expense was as follows (in thousands):


	Three Months Ended June 30,				Six Months Ended June 30,
	2022		2021		2022		2021
Cost of revenue	$	11,211	$	24,029	$	22,888	$	40,006
Sales and marketing	49,405		72,008		98,677		129,294
Research and development	24,978		50,630		51,883		88,504
General and administrative	60,175		86,075		121,644		168,669
Total stock-based compensation expense	$	145,769	$	232,742	$	295,092	$	426,473