Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

Shareholders' Equity [Abstract]

Fair values of stock option grants estimated with weighted average assumptions

The fair values of our equity awards, primarily stock option grants, were estimated with the following weighted average assumptions:

	Year Ended December 31,
	2012			2011
Dividend yield		0	%		0	%
Expected life		3.8 years			3.9 years
Expected volatility		73	%		74	%
Risk-free interest rate		0.6	%		1.1	%

Impact on the results of operations of recording stock-based compensation expense

The impact on our results of operations of recording stock-based compensation expense for the years ended December 31, 2012 and 2011 was as follows (in thousands, except per share amounts):

	Year Ended December 31,
	2012		2011
Cost of revenue—service	$	315	$	668
Selling, general and administrative		521		1,363
Research and development		115		147
Total stock-based compensation expense	$	951	$	2,178
Per diluted share	$	0.08	$	0.21

Summary of stock option activity under the plans

Stock Option Activity

The following table summarizes stock option activity under the Plans for 2012 and 2011:

Stock Options	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Balance at January 1, 2011		1,942,723		$	3.66		4.91
Granted at fair value		423,715			7.93
Exercised		(208,821	)		2.94
Forfeited		(44,334	)		3.32
Expired		(173,808	)		5.74
Balance at December 31, 2011		1,939,475		$	4.49		4.33
Granted at fair value		244,125			3.27
Exercised		(90,786	)		2.41
Forfeited		(327,422	)		6.67
Expired		(225,774	)		7.24
Balance at December 31, 2012		1,539,618		$	3.55		4.24	$	363,000
Vested and expected to vest at December 31, 2012		1,491,531		$	3.55		4.13	$	362,000
Exercisable at December 31, 2012		1,181,590		$	3.49		3.14	$	343,000

Summary of certain information about stock options

The following table summarizes certain information about stock options for 2012 and 2011:

	Year Ended December 31,
	2012		2011
Weighted average grant-date fair value for options granted during the year	$	2.02	$	4.52
Options in-the-money at December 31		606,666		708,441
Aggregate intrinsic value of options exercised	$	73,000	$	909,117

Summary of Restricted Stock Award activity

Restricted Stock Award Activity

The following table summarizes restricted stock award activity under the Stock Plan for 2012 and 2011:

	Number of Shares			Weighted Average Grant-Date Fair Value
Unvested at December 31, 2010		42,000		$	3.78
Granted		30,000			6.58
Vested		(45,000	)		3.64
Forfeited		—			—
Unvested at December 31, 2011		27,000		$	6.49
Granted		0			0
Vested		(27,000	)		6.49
Forfeited		—			—
Unvested at December 31, 2012		0		$	0
Expected to vest after December 31, 2012		0		$	0

Summary of Restricted Stock Unit activity

Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity under the Stock Plan for 2012 and 2011:

	Number of Shares			Weighted Average Exercise Price
Unvested at December 31, 2010		221,776		$	5.27
Granted		312,760		$	5.57
Vested		(260,803	)	$	3.85
Forfeited		(32,485	)	$	4.80
Unvested at December 31, 2011		241,248		$	5.91
Granted		177,592			3.49
Vested		(148,743	)		4.98
Forfeited		(33,584	)		6.07
Unvested at December 31, 2012		236,513		$	4.95
Expected to vest after December 31, 2012		215,912		$	4.85

Summary of shares of common stock reserved for future issuance under the Plans

The following table summarizes our shares of common stock reserved for future issuance under the Plans at December 31, 2012 and 2011:

	December 31,
	2012		2011
Stock options outstanding		1,539,618		1,939,475
Restricted stock units outstanding		236,513		241,248
Stock options available for future grant		1,157,149		617,086
Common stock reserved for future issuance		2,933,280		2,797,809