Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of Stock by Class

	Authorized		Issued and outstanding
	Number of shares
	December 31,		December 31,
	2019	2018	2019	2018
Stock of $0.001 par value:
Common stock	200,000,000	200,000,000	30,583,311	29,576,880

Share-based Compensation, Stock Options, Activity

A summary of employees’ stock options activities during the year ended December 31, 2019 is as follows:

	Year ended
	December 31, 2019
	Number		Weighted average exercise price		Aggregate intrinsic value (in thousands)		Weighted average remaining contractual life (years)
Options outstanding at the beginning of the year	709,668		$	17.941	$	24,810	4.513
Granted	—		$	—
Exercised	(253,715	)	$	13.068
Forfeited	(1,605	)	$	27.512
Options outstanding at the end of the period	454,348		$	20.628	$	25,935	4.343
Options exercisable at the end of the period	452,264		$	20.645	$	25,808	4.335

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The options outstanding as of December 31, 2019 have been separated into ranges of exercise price as follows:

Range of exercise price					Options outstanding as of December 31, 2019	Weighted average remaining contractual life (years)	Weighted average exercise price		Options exercisable as of December 31, 2019	Weighted average remaining contractual life (years)	Weighted average exercise price of options exercisable
		$	1.576		1,970	0.038	$	1.576	1,970	0.038	$	1.576
$	6.230	—		8.800	11,856	1.992	$	8.084	11,856	1.992	$	8.084
$	12.470	—		16.870	130,925	4.045	$	14.112	128,841	4.012	$	14.057
$	19.510	—		21.660	164,253	4.587	$	21.177	164,253	4.587	$	21.177
$	22.010	—		24.230	70,848	4.268	$	22.434	70,848	4.268	$	22.434
		$	29.880		56,879	5.145	$	29.880	56,879	5.145	$	29.880
		$	39.860		17,617	4.057	$	39.860	17,617	4.057	$	39.860
					454,348	4.343	$	20.628	452,264	4.335	$	20.645

Schedule of Stockholders' Equity Note, Warrants or Rights

The Company’s outstanding options granted to consultants for services as of December 31, 2019 were as follows:

Issuance date	Options for shares of common stock	Exercise price per share		Options exercisable	Exercisable through
	(number)			(number)
February 2013	1,500	$	12.470	1,500	February 2023
August 2013	4,000	$	21.140	4,000	August 2023
March 2014	3,750	$	39.860	3,750	March 2024
May 2014	3,700	$	22.010	3,700	May 2024
November 2014	4,218	$	21.660	4,218	November 2024
May 2015	1,137	$	19.510	1,137	May 2025
February 2016	1,982	$	16.870	1,877	February 2026
	20,287			20,182

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following provides a summary of the restricted stock unit activity for the Company for the year ended December 31, 2019:

	Number of Shares Underlying Outstanding Restricted Stock Units		Weighted- Average Grant Date Fair Value
Outstanding as of January 1, 2019	2,440,027		$	40.00
Granted	1,307,134		$	58.22
Vested	(823,036	)	$	36.45
Forfeited	(365,042	)	$	46.37
Unvested as of December 31, 2019	2,559,083		$	49.58

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The Company recognized non-cash stock-based compensation expense in the consolidated statements of operations as follows (in thousands):

	Year ended
	December 31,
	2019		2018		2017
Cost of revenues	$	2,561	$	1,757	$	1,078
Research and development	13,188		9,645		5,209
Sales and marketing	14,782		16,081		8,542
General and administrative	15,608		7,478		5,006
Total	$	46,139	$	34,961	$	19,835