STOCKHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of Stock by Class

The following table presents the number of shares authorized and issued as of the dates indicated:

	March 31, 2020		December 31, 2019
	Shares Authorized	Shares Issued	Shares Authorized	Shares Issued
Stockholders’ equity:
Common stock, $0.000001 par value	200,000,000	71,887,846	200,000,000	71,185,468
Undesignated preferred stock	10,000,000	—	10,000,000	—

Schedule of Stock Option Activity

A summary of stock option activity for the three months ended March 31, 2020 is as follows:

	Number of Shares	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2019	6,210,385	$	25.10	4.3	$	75,805
Granted	86,500	28.94
Exercised	(200,847)	12.87
Canceled	(77,311)	46.89
Outstanding at March 31, 2020	6,018,727	$	25.29	4.3	$	18,213
Options vested and exercisable at March 31, 2020	5,167,499	$	23.33	3.7	$	18,213

Schedule of RSU Activity

A summary of RSU and PRSU activity for the three months ended March 31, 2020 is as follows:

	Number of Shares	Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2019	7,625,584	$	36.51
Granted	2,690,821	35.58
Vested(1)	(840,805)	36.50
Canceled	(448,618)	36.54
Nonvested at March 31, 2020	9,026,982	$	36.23

⁽¹⁾ Includes 339,274 shares that vested but were not issued due to net share settlement for payment of employee taxes.

Schedule of Stock-Based Compensation Expense

The following table summarizes the effects of stock-based compensation expense related to stock-based awards in the condensed consolidated statements of operations during the periods presented (in thousands):

	Three Months Ended March 31,
	2020		2019
Cost of revenue	$	1,043	$	1,244
Sales and marketing	7,696		7,687
Product development	17,755		16,075
General and administrative	5,256		6,313
Total stock-based compensation recorded to (loss) income before income taxes	31,750		31,319
Benefit from income taxes	(12,557)		(8,113)
Total stock-based compensation recorded to net (loss) income	$	19,193	$	23,206