Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 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 September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Dividend yield		0	%		0	%		0	%		0	%
Expected life	3.3 years			4 years			3.3 years			4 years
Expected volatility		57	%		58	%		59	%		62	%
Risk-free interest rate		1.4	%		1.1	%		1.3	%		0.8	%

Stock-Based Compensation Expense

The impact on our results of operations of stock-based compensation expense for the three and nine months ended September 30, 2014 and 2013 was as follows (in thousands, except per share amounts):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Cost of revenue — service	$	69	$	48	$	146	$	184
Selling, general and administrative		144		145		510		456
Research and development		15		27		35		86
Total stock-based compensation expense	$	228	$	220	$	691	$	726
Per diluted share	$	0.02	$	0.02	$	0.06	$	0.07

Summary of Stock Option Activity

The following table summarizes stock option activity under the Plans for the nine months ended September 30, 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		740,458			3.48
Exercised		(374,565	)		2.49
Forfeited		(96,531	)		3.27
Expired		(258,671	)		4.34
Balance at September 30, 2014		1,526,312		$	3.48		6.91	$	954,646
Vested and expected to vest at September 30, 2014		1,407,188		$	3.48		6.73	$	900,866
Exercisable at September 30, 2014		593,423		$	3.50		3.90	$	498,217

Summary of Certain Information about Stock Options

The following table summarizes certain information about stock options for the three and nine months ended September 30, 2014 and 2013:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
Weighted-average grant-date fair value of option    grants for the period	$	1.74	$	—	$	1.71		1.07
Options in-the-money at period end		425,877		541,000		425,877		541,000
Aggregate intrinsic value of options exercised	$	171,558	$	—	$	412,781	$	1,000

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the nine months ended September 30, 2014:

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at December 31, 2013		187,382		$	4.40
Granted		102,735			3.16
Vested		(132,421	)		3.70
Forfeited		(56,732	)		5.54
Unvested at September 30, 2014		100,964		$	3.43
Expected to vest after September 30, 2014		96,371		$	3.37

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:

	September 30, 2014
Stock options outstanding		1,526,312
Restricted stock units outstanding		100,964
Stock awards available for future grant		706,053
Common stock reserved for future issuance		2,333,329