Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2020

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation Expense for Employees and Non-Employees

Total share-based compensation expense recorded for employees and non-employees is as follows (in thousands):

	Three Months Ended March 31,
	2020		2019
Cost of revenues	$	169	$	125
Research and development	6,991		4,917
Sales and marketing	2,186		1,808
General and administrative	8,988		8,188
Total share-based compensation expense	$	18,334	$	15,038

Summary of Restricted Stock Unit Activity

Activity for RSUs and PSUs is as follows:

	RSUs and PSUs Outstanding
	Shares Outstanding		Weighted  Average Grant Date  Fair Value
Balance at December 31, 2019	6,909,530		$	24.04
Granted	1,760,947		38.74
Released	(2,793,397	)	16.89
Canceled	(214,121	)	28.64
Balance at March 31, 2020	5,662,959		$	31.96