Equity Award Plans (Tables)

6 Months Ended

Jun. 30, 2020

Share-based Payment Arrangement [Abstract]

Summary of the Activity for Stock Option Changes and Summary of Information Related to Options Outstanding and Options Exercisable

A summary of the activity for our stock option changes during the reporting period and a summary of information related to options outstanding and options exercisable are presented below (in thousands, except per share amounts and contractual life years):

	Options Outstanding
	Number of Shares		Weighted- Average Exercise Price (per share)		Weighted- Average Contractual Life (years)	Aggregate Intrinsic Value
Balance — December 31, 2019	4,391		$	9.07	5.2	$	45,931
Exercised	(780	)	4.79			6,260
Cancelled	(186	)	16.31
Balance — June 30, 2020	3,425		$	9.65	4.8	$	22,061
Options exercisable — June 30, 2020	2,449		$	12.09	3.4	$	13,607

Summary of Activity for Restricted Common Stock, RSAs and RSUs and Summary of Information Related to Unvested Restricted Common Stock, RSAs and RSUs and those Expected to Vest

A summary of the activity for our restricted common stock, RSAs and RSUs during the reporting periods and a summary of information related to unvested restricted common stock, RSAs and RSUs, including those expected to vest based on the achievement of a performance condition, are presented below (in thousands, except per share amounts and contractual life years):

	Number of Shares		Weighted- Average Grant Date Fair Value (per share)		Weighted- Average Contractual Life (years)	Aggregate Intrinsic Value
Unvested balance — December 31, 2019	21,697		$	16.07	1.2	$	358,651
Granted	12,757		15.26
Vested	(6,130	)	15.18
Cancelled	(5,644	)	16.71
Unvested balance — June 30, 2020	22,680		$	15.49	1.5	$	276,237
Unvested awards for which the requisite service period has not been rendered and vesting is subject to the achievement of a performance condition — June 30, 2020	1,361		$	13.65	1.7	$	16,575

Schedule of Assumptions used in Black-Scholes Option Pricing Model

The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine fair value of our common shares to be issued under the ESPP for the offering periods beginning in May 2019:

	Three and Six Months Ended June 30, 2020	Three and Six Months Ended June 30, 2019
Fair value of common stock	$13.06	$14.59
Risk-free interest rate	0.17% - 0.18%	2.21% - 2.35%
Expected term (in years)	0.5 - 1.0	0.5 - 1.0
Volatility	52% - 68%	39%
Dividend yield	—%	—%

Schedule of Stock-Based Compensation Expense Related to Stock Options, ESPP and Restricted Stock Units and Awards

Stock-based compensation expense related to stock options, ESPP and restricted stock unit awards is included in the condensed consolidated statements of operations as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Cost of product, subscription and support revenue	$	4,051	$	3,964	$	7,792	$	7,911
Cost of professional services revenue	4,450		3,641		8,351		7,350
Research and development	9,861		11,889		21,406		24,313
Sales and marketing	11,410		13,227		22,896		25,767
General and administrative	6,981		7,430		12,486		15,133
Restructuring	293		—		293		—
Total	$	37,046	$	40,151	$	73,224	$	80,474