Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2015

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,
	2015			2014			2015			2014
Dividend yield		0	%		0	%		0	%		0	%
Expected life	3.3 years			3.3 years			3.3 years			3.2 years
Expected volatility		52	%		59	%		52	%		60	%
Risk-free interest rate		1.3	%		1.3	%		1.2	%		1.2	%

Stock-Based Compensation Expense

The impact on our results of operations of stock-based compensation expense for the three and six month periods ended June 30, 2015 and 2014 was as follows (in thousands, except per share amounts):

	Three Months Ended June 30,					Six Months Ended June 30,
	2015		2014			2015		2014
Cost of revenue — service	$	105	$	36		$	218	$	77
Selling, general and administrative		182		191			320		366
Research and development		18		(8	)		31		20
Total stock-based compensation expense	$	305	$	219		$	569	$	463
Per diluted share	$	0.02	$	0.02		$	0.05	$	0.04

Summary of Stock Option Activity

The following table summarizes stock option activity under the Plans for the six month period ended June 30, 2015:

Stock Options	Number of Shares			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Balance at January 1, 2015		1,553,360		$	3.50
Granted		24,725			4.33
Exercised		(117,056	)		2.95
Forfeited		(58,429	)		3.29
Expired		(6,376	)		2.62
Balance at June 30, 2015		1,396,224		$	3.57		6.83	$	4,497,910
Vested and expected to vest at June 30, 2015		1,324,724		$	3.57		6.73	$	4,270,113
Exercisable at June 30, 2015		623,582		$	3.58		4.71	$	2,011,909

Summary of Certain Information about Stock Options

The following table summarizes certain information about stock options for the three and six month periods ended June 30, 2015 and 2014:

	Three Months Ended June 30,				Six Months Ended June 30,
	2015		2014		2015		2014
Weighted-average grant-date fair value of option    grants for the period	$	1.88	$	1.88	$	1.92	$	1.68
Options in-the-money at period end		1,390,199		450,914		1,390,199		450,914
Aggregate intrinsic value of options exercised	$	302,895	$	110,347	$	350,776	$	241,224

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the six month period ended June 30, 2015:

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at December 31, 2014		80,179		$	3.40
Granted		50,728			6.32
Vested		(50,391	)		3.42
Forfeited		(8,976	)		3.15
Unvested at June 30, 2015		71,540		$	5.48
Expected to vest after June 30, 2015		68,810		$	5.51

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 as of June 30, 2015:

Stock options outstanding	1,396,224
RSUs outstanding	71,540
Stock awards available for future grant	1,602,411
Common stock reserved for future issuance	3,070,175