Shareholders' Equity (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
Dividend yield		0	%		0	%		0	%		0	%
Expected life		3.3 years			4 years			3.2 years			4 years
Expected volatility		59	%		61	%		60	%		64	%
Risk-free interest rate		1.3	%		0.7	%		1.2	%		0.7	%

Stock-Based Compensation Expense

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

	Three Months Ended June 30,					Six Months Ended June 30,
	2014			2013		2014		2013
Cost of revenue — service	$	36		$	63	$	77	$	136
Selling, general and administrative		191			162		366		311
Research and development		(8	)		29		20		59
Total stock-based compensation expense	$	219		$	254	$	463	$	506
Per diluted share	$	0.02		$	0.02	$	0.04	$	0.05

Summary of Stock Option Activity

The following table summarizes stock option activity under the Plans for the six months ended June 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		337,325			3.32
Exercised		(254,152	)		2.43
Forfeited		(34,021	)		3.13
Expired		(239,371	)		4.47
Balance at June 30, 2014		1,325,402		$	3.34		5.79	$	348,579
Vested and expected to vest at June 30, 2014		1,248,749		$	3.34		5.62	$	345,455
Exercisable at June 30, 2014		708,013		$	3.34		3.55	$	310,236

Summary of Certain Information about Stock Options

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Weighted-average grant-date fair value of option grants for the period	$	1.88	$	0	$	1.68		1.65
Options in-the-money at period end		450,914		626,000		450,914		626,000
Aggregate intrinsic value of options exercised	$	110,347	$	1,000	$	241,224	$	1,000

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the six months ended June 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		(90,595	)		3.85
Forfeited		(41,912	)		5.67
Unvested at June 30, 2014		157,610		$	3.57
Expected to vest after June 30, 2014		148,394		$	3.45

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 June 30, 2014:

	June 30, 2014
Stock options outstanding		1,325,402
Restricted stock units outstanding		157,610
Stock awards available for future grant		1,012,556
Common stock reserved for future issuance		2,495,568