Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2016

Stockholders' Equity

Schedule of key assumptions to determine fair value of options

	Three Months Ended
	March 31,
	2016		2015
Average volatility	30.2	%	27.5	%
Risk-free interest rate	1.6	%	1.3	%
Weighted-average expected life in years	5.7		4.7
Dividend yield rate	—	%	—	%

Schedule of the summary of option activity under all plans

				Weighted-Average
		Weighted-Average		Remaining	Aggregate
		Exercise		Contractual	Intrinsic
	Options	Price		Term (Years)	Value(1)
					(in thousands)
Outstanding as of December 31, 2015	12,240,467	$	15.41
Options granted	2,225,900		11.85
Options exercised	(9,200)		11.31
Options cancelled	(15,235)		14.03
Options expired	(105,693)		24.12
Outstanding as of March 31, 2016	14,336,239	$	14.80	4.89	$	3,670
Exercisable as of March 31, 2016	7,896,359	$	16.10	3.44	$	2,024

The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the estimated fair value of the Company’s common stock for those awards that have an exercise price below the estimated fair value at March 31, 2016.

Schedule of information relating to options grants

	Three Months Ended
	March 31,
	2016		2015
	(in thousands, except per share data)
Weighted-average grant date fair value	$	3.37	$	3.53
Intrinsic value of options exercised		15		189
Cash received		104		910
Total fair value of the options vested during the year		3,259		1,423

Schedule of the summary of nonvested options status

		Weighted-Average
		Grant Date
	Options	Fair Value
Nonvested as of December 31, 2015	5,202,095	$	3.44
Options granted	2,225,900		3.37
Options vested	(972,880)		3.35
Options forfeited	(15,235)		4.89
Nonvested as of March 31, 2016	6,439,880		3.42

Schedule of information relating to RSU grants and deliveries

		Total Fair Market
		Value of RSUs
		Issued
	Total RSUs	as
	Issued	Compensation(1)
		(in thousands)
RSUs outstanding at December 31, 2015	866,540
RSUs granted	661,228	$	7,492
RSUs forfeited	(2,151)
Common stock delivered	(133,010)
RSUs surrendered for taxes	(90,550)
RSUs outstanding at March 31, 2016	1,302,057

The total fair market value is derived from the number of RSUs granted times the current stock price on the date of grant.

Schedule of recorded share-based compensation expense under all plans

	Three Months Ended
	March 31,
	2016		2015
	(in thousands)
Cost of revenues	$	799	$	488
Operating expenses:
Selling, distribution and marketing		66		40
General and administrative		2,646		1,490
Research and development		340		212
Total share-based compensation	$	3,851	$	2,230

Schedule of changes in stockholders' equity

	Three Months
	Ended
	March 31,
	2016
	(in thousands)
Stockholders’ equity as of December 31, 2015	$	295,510
Net income		2,489
Accumulated other comprehensive income		436
Exercise of stock options		104
Nonemployee share-based compensation expense		453
Employee share-based compensation expense		3,398
Repurchase of common stock(1)		(1,083)
Purchase of treasury stock		(4,722)
Stockholders’ equity as of March 31, 2016	$	296,585

⁽¹⁾ Repurchase of common stock relating to the tax withholding of equity award settlements.