Stock-Based Compensation

3 Months Ended

Mar. 31, 2013

Stock-Based Compensation [Abstract]

STOCK-BASED COMPENSATION

9.   STOCK-BASED COMPENSATION

  Stock Options and Awards

The Company’s equity incentive program is a long-term retention program that is intended to attract, retain, and provide incentives for talented employees, consultants, officers, and directors and to align stockholder and employee interests. The Company may grant options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance shares, performance units, and other stock-based or cash-based awards to employees, officers, directors, and consultants. Under these programs, stock options may be granted at prices not less than the fair market value on the date of grant for stock options. These options generally vest over 4 years and expire from 5 to 10 years from the date of grant. Restricted stock generally vests over one year. RSUs generally vest over 3 years. Awards granted other than an option or stock appreciation right shall reduce the common stock shares available for grant by 1.75 shares for every share issued.

	March 31,
	2013
Common stock shares available for grant		2,037,130
Common stock options outstanding		3,738,174
Restricted stock awards outstanding		44,000
Restricted stock units outstanding		794,165

  Employee Stock Purchase Plan

The Company has an Employee Stock Purchase Plan (“ESPP”). Under the ESPP, eligible employees may purchase common stock through payroll deductions at a purchase price of 85% of the lower of the fair market value of the Company’s stock at the beginning of the offering period or the purchase date. Participants may not purchase more than 2,000 shares in a six-month offering period or purchase stock having a value greater than $25,000 in any calendar year as measured at the beginning of the offering period. A total of 1,000,000 shares of common stock have been reserved for issuance under the ESPP. As of March 31, 2013, 498,522 shares had been purchased since the inception of the ESPP in 1999. Under ASC 718-10, the ESPP is considered a compensatory plan and the Company is required to recognize compensation cost related to the fair value of the award purchased under the ESPP. Shares purchased under the ESPP for the three months ended March 31, 2013 are listed below. Shares purchased under the ESPP for the three months ended March 31, 2012 are 10,656. The intrinsic value listed below is calculated as the difference between the market value on the date of purchase and the purchase price of the shares.

	Three Months
	Ended
	March 31,
	2013
Shares purchased under ESPP		16,003
Average price of shares purchased under ESPP	$	4.51
Intrinsic value of shares purchased under ESPP	$	36,727

Summary of Stock Options

The following table sets forth the summary of option activity under the Company’s stock option plans for the three months ended March 31, 2013 and year ended December 31, 2012:

	Three Months			Year
	Ended			Ended
	March 31,			December 31,
	2013			2012
Beginning outstanding balance		3,155,631			3,267,838
Granted		877,500			425,150
Exercised		(273,957	)		(231,403	)
Forfeited and cancelled		(21,000	)		(305,954	)
Ending outstanding balance		3,738,174			3,155,631
Aggregate intrinsic value of options exercised	$	872,353		$	443,000
Weighted average fair value of options granted		5.31			3.35

The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying awards and the quoted price of the Company’s common stock for the options that were in-the-money.

Information regarding stock options outstanding at March 31, 2013 and December 31, 2012 is summarized below:

					Weighted
			Weighted		Average		Aggregate
			Average		Remaining		Intrinsic
	Number of		Exercise		Contractual		Value
	Shares		Price		Life (years)		(In millions)
December 31, 2012
Options outstanding		3,155,631	$	6.65		5.24	$	3.5
Options vested and expected to vest using estimated forfeiture rates		3,019,979		6.67		5.17		3.4
Options exercisable		2,329,987		6.91		4.69		2.5
March 31, 2013
Options outstanding		3,738,174	$	7.33		5.59	$	17.2
Options vested and expected to vest using estimated forfeiture rates		3,445,934		7.24		5.49		16.2
Options exercisable		2,123,986		6.90		4.71		11.0

Summary of Restricted Stock Units

RSU activity for the three months ended March 31, 2013 and year ended December 31, 2012 was as follows:

	Three Months			Year
	Ended			Ended
	March 31,			December 31,
	2013			2012
Beginning outstanding balance		708,651			407,765
Awarded		290,150			555,911
Released		(193,222	)		(203,519	)
Forfeited		(11,414	)		(51,506	)
Ending outstanding balance		794,165			708,651
Weighted average grant date fair value of RSUs granted	$	7.02		$	6.64
Total fair value of RSUs released		1,491,038			1,128,000
Total fair value of RSUs remaining unvested		9,323,497			4,868,000

Information regarding RSUs outstanding at March 31, 2013 and December 31, 2012 is summarized below:

		Weighted
		Average		Aggregate
		Remaining		Intrinsic		Fair
	Number of	Contractual		Value		Value
	Shares	Life (years)		(In millions)		(In millions)
December 31, 2012
RSUs outstanding	708,651		1.09	$	4.9	$	4.9
RSUs vested and expected to vest using estimated forfeiture rates	588,170		1.05		4.0
March 31, 2013
RSUs outstanding	794,165		1.59	$	9.3	$	9.3
RSUs vested and expected to vest using estimated forfeiture rates	638,628		1.38		7.5

Summary of Restricted Stock Awards

Restricted stock award activity for the three months ended March 31, 2013 and year ended December 31, 2012 was as follows:

	Three Months		Year
	Ended		Ended
	March 31,		December 31,
	2013		2012
Beginning outstanding balance		44,000		18,000
Awarded		0		57,750
Released		0		(31,750	)
Forfeited		0		0
Ending outstanding balance		44,000		44,000
Weighted average grant date fair value of restricted stock awarded	$	0.00	$	5.70
Total fair value of restricted stock awards released		0		171,000

Stock Plan Assumptions

The assumptions used to value option grants under the Company’s Stock Plans were as follows:

	Three Months Ended
	March 31,
Options	2013			2012
Expected life (in years)		4.7			4.5
Volatility		69	%		71	%
Interest rate		0.8	%		0.8	%
Dividend yield		N/	A		N/	A
Employee Stock Purchase Plan	2013			2012
Expected life (in years)		0.5			0.5
Volatility		66	%		72	%
Interest rate		0.1	%		0.1	%
Dividend yield		N/	A		N/	A

Compensation Costs

Total stock-based compensation recognized in the condensed consolidated statements of operations and comprehensive income (loss) is as follows:

	Three Months Ended
	March 31,
	2013		2012
	(In thousands)
Statement of Operations Classifications
Sales and marketing	$	163	$	115
Research and development		314		209
General and administrative		560		396
Total	$	1,037	$	720

As of March 31, 2013, there was $8.9 million related to stock options, restricted stock awards, and RSUs of unrecognized compensation cost, adjusted for estimated forfeitures, granted to the Company’s employees and directors. This cost will be recognized over an estimated weighted-average period of approximately 3.65 years for options, 2.31 years for RSUs, and 0.17 years for restricted stock awards. Total unrecognized compensation cost will be adjusted for future changes in estimated forfeitures.

Stock Repurchase Program

On November 1, 2007, the Company announced its Board of Directors authorized the repurchase of up to $50 million of the Company’s common stock. The Company may repurchase its stock for cash in the open market in accordance with applicable securities laws. The timing of and amount of any stock repurchase will depend on share price, corporate and regulatory requirements, economic and market conditions, and other factors. The stock repurchase authorization has no expiration date, does not require the Company to repurchase a specific number of shares, and may be modified, suspended, or discontinued at any time. During the three months ended March 31, 2013 and 2012, there were no stock repurchases under this program, but the program currently remains available.