Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Fair Values of Stock Option Grants Estimated with Weighted Average Assumptions

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

	Three Months Ended March 31,
	2014			2013
Dividend yield		0	%		0	%
Expected life		3.2 years			3.7 years
Expected volatility		61	%		68	%
Risk-free interest rate		1.2	%		0.6	%

Stock-Based Compensation Expense

Stock-based compensation expense for the three months ended March 31, 2014 and 2013 was as follows (in thousands, except per share amounts):

	Three Months Ended March 31,
	2014		2013
Cost of revenue — service	$	41	$	73
Selling, general and administrative		175		149
Research and development		28		30
Total stock-based compensation expense	$	244	$	252
Per basic and diluted share	$	0.02	$	0.02

Summary of Stock Option Activity

The following table summarizes stock option activity for the three months ended March 31, 2014:

Stock Options	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Balance at January 1, 2014		1,515,621		$	3.36
Granted at fair value		330,850			3.32
Exercised		(123,613	)		2.48
Forfeited		(12,959	)		3.64
Expired		(57,032	)		5.92
Balance at March 31, 2014		1,652,867		$	3.33		4.91	$	444,091
Vested and expected to vest at March 31, 2014		1,561,427		$	3.33		4.69	$	444,151
Exercisable at March 31, 2014		983,478		$	3.30		2.57	$	398,709

Summary of Certain Information about Stock Options

The following table summarizes certain information about stock options for the three months ended March 31, 2014 and 2013:

	Three Months Ended March 31,
	2014		2013
Weighted-average grant-date fair value of option grants for the period	$	1.82	$	1.65
Options in-the-money at period end		585,885		615,419
Aggregate intrinsic value of options exercised	$	130,876	$	1,000

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the three months ended March 31, 2014:

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at December 31, 2013		187,382		$	4.40
Granted		15,000			3.34
Vested		(52,858	)		4.17
Forfeited		(23,125	)		5.60
Unvested at March 31, 2014		126,399		$	4.16
Expected to vest after March 31, 2014		120,556		$	4.02

Summary of Shares of Common Stock Reserved for Future Issuance under Plans

The following table summarizes our shares of common stock reserved for future issuance under the Plans at March 31, 2014:

	March 31, 2014
Stock options outstanding		1,652,867
Restricted stock units outstanding		126,399
Stock options available for future grant		884,578
Common stock reserved for future issuance		2,663,844