Employee Benefit Plans and Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Employee Benefit Plans and Stock-based Compensation [Abstract]

The following summarizes our stock option activity under the 2007 Plan, and the related weighted average exercise price within each category for each of the years ended December 31, 2012, 2013 and 2014 (in thousands, except per share data):

Stock Options	Number of Options Outstanding			Weighted- average Exercise Price		Weighted- average Remaining Contractual Life		Aggregate Intrinsic Value
						(in years)
Balance as of January 1, 2012		2,380		$	3.25		6.25	$	3,456
Granted		592			3.32
Exercised		(136	)		2.17
Canceled and expired		(109	)		4.25
Balance as of December 31, 2012		2,727			3.28		6.71	$	1,353
Granted		488			2.38
Exercised		(331	)		1.62
Canceled and expired		(213	)		3.60
Balance as of December 31, 2013		2,671		$	3.29		6.71	$	893
Granted		712			2.40
Exercised		(111	)		1.21
Canceled and expired		(74	)		5.18
Balance as of December 31, 2014		3,198		$	3.12		6.95	$	1,247
Options vested and expected to vest as of December 31, 2014		3,198		$	3.12		6.95	$	1,247
Options exercisable as of December 31, 2014		1,859		$	3.46		5.48	$	821

Options outstanding and exercisable

The options outstanding and exercisable as of December 31, 2014 were in the following exercise price ranges (in thousands, except per share data):

	Options Outstanding as of December 31, 2014						Options Vested and Exercisable as of December 31, 2014
Range of Exercise Price	Shares		Weighted-average Exercise Price		Weighted-average Remaining Contractual Life		Shares		Weighted-Average Exercise Price
$1.33 - $1.59		401	$	1.52		3.33		401	$	1.52
$1.91 - $1.91		4	$	1.91		0.87		4	$	1.91
$2.04 - $2.04		333	$	2.04		4.82		333	$	2.04
$2.14 - $2.29		252	$	2.26		9.40		0	$	0.00
$2.36 - $2.36		428	$	2.36		8.84		116	$	2.36
$2.47 - $2.47		460	$	2.47		9.84		0	$	0.00
$2.91 - $2.91		444	$	2.91		7.85		231	$	2.91
$3.18 - $4.09		29	$	3.85		6.31		20	$	3.84
$4.79 - $4.79		330	$	4.79		6.82		262	$	4.79
$4.81 - $7.82		517	$	5.79		5.17		492	$	5.80
		3,198	$	3.12		6.95		1,859	$	3.46

Restricted stock awards

A summary of activity related to restricted stock awards for the years ended December 31, 2014, 2013 and 2012 is presented below:

Stock Awards	Shares			Weighted-Average Grant Date Fair Value
Non-vested as of January 1, 2012		223,127		$	4.47
Granted		113,768		$	3.18
Vested		(98,172	)	$	3.42
Non-vested as of December 31, 2012		238,723		$	4.27
Granted		103,636		$	2.52
Vested		(85,127	)	$	4.56
Forfeited		(16,000	)	$	4.03
Non-vested as of December 31, 2013		241,232		$	3.44
Granted		121,044		$	2.34
Vested		(100,779	)	$	4.01
Non-vested as of December 31, 2014		261,497		$	2.71

Common stock reserved for future issuance

The following number of shares of common stock were reserved and available for future issuance at December 31, 2014:

Options outstanding		3,197,840
Restricted stock awards outstanding		261,497
Stock available for future grant: 2007 Equity Incentive Plan		1,002,898

Total		4,462,235

Compensation costs related to stock-based awards

The following table summarizes compensation costs related to our stock-based compensation awards (in thousands, except per share data):

	Years Ended December 31,
	2014			2013			2012
Stock-based compensation in the form of employee stock options and restricted stock, included in:
Cost of revenue	$	18		$	22		$	78
Selling, general and administrative		938			1,091			1,000
Research and development		173			164			137
Total stock-based compensation		1,129			1,277			1,215
Tax effect on stock-based compensation		—			—			—
Net effect on net income	$	1,129		$	1,277		$	1,215
Shares used in computing basic net income per share		32,452			32,700			32,144
Shares used in computing diluted net income per share		32,452			32,700			32,865
Effect on basic net income per share	$	(0.03	)	$	(0.04	)	$	(0.04	)
Effect on diluted net income per share	$	(0.03	)	$	(0.04	)	$	(0.04	)

Weighted-average assumptions

The fair value of options granted was estimated at the date of grant using the following weighted-average assumptions:

	Years Ended December 31,
	2014			2013			2012
Expected term (in years)		4.1			4.0			4.0
Volatility		63.20	%		59.20	%		72.87	%
Expected dividend		0	%		0	%		0	%
Risk-free interest rate		1.85	%		0.98	%		0.57	%