Equity Award Plans (Tables)

9 Months Ended

Sep. 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	(1,144	)	5.48			8,863
Cancelled	(248	)	15.82
Balance — September 30, 2020	2,999		$	9.87	4.7	$	20,115
Options exercisable — September 30, 2020	2,207		$	12.06	3.5	$	13,327

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	14,654		15.03
Vested	(8,150	)	15.20
Cancelled	(6,568	)	16.54
Unvested balance — September 30, 2020	21,633		$	15.34	1.4	$	267,163
Unvested awards for which the requisite service period has not been rendered and vesting is subject to the achievement of a performance condition — September 30, 2020	1,574		$	17.86	1.6	$	19,435

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 2020:

	Three and Nine Months Ended September 30, 2020	Three and Nine Months Ended September 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 September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Cost of product, subscription and support revenue	$	4,245	$	3,590	$	12,037	$	11,501
Cost of professional services revenue	5,015		3,289		13,366		10,639
Research and development	11,830		10,718		33,236		35,031
Sales and marketing	13,306		12,252		36,202		38,019
General and administrative	5,952		6,839		18,438		21,972
Restructuring	21		—		314		—
Total	$	40,369	$	36,688	$	113,593	$	117,162