Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2015			2014
Dividend yield		0	%		0	%
Expected life	3.3 years			3.2 years
Expected volatility		53	%		61	%
Risk-free interest rate		1.2	%		1.2	%

Stock-Based Compensation Expense

The impact on our results of operations of stock-based compensation expense for the three months ended March 31, 2015 and 2014 was as follows (in thousands, except per share amounts):

	Three Months Ended March 31,
	2015		2014
Cost of revenue — service	$	113	$	41
Selling, general and administrative		13		175
Research and development		138		28
Total stock-based compensation expense	$	264	$	244
Per diluted share	$	0.02	$	0.02

Summary of Stock Option Activity

The following table summarizes stock option activity under the Plans for the three months ended March 31, 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		2,500			4.47
Exercised		(28,387	)		2.97
Forfeited		(45,998	)		3.20
Expired		(2,751	)		3.13
Balance at March 31, 2015		1,478,724		$	3.52		6.72	$	1,896,962
Vested and expected to vest at March 31, 2015		1,390,599		$	3.51		6.59	$	1,797,179
Exercisable at March 31, 2015		667,215		$	3.44		4.39	$	971,305

Summary of Certain Information about Stock Options

The following table summarizes certain information about stock options for the three months ended March 31, 2015 and 2014:

	Three Months Ended March 31,
	2015		2014
Weighted-average grant-date fair value of option    grants for the period	$	2.34	$	1.82
Options in-the-money at period end		1,353,633		585,885
Aggregate intrinsic value of options exercised	$	47,880	$	130,876

Summary of Restricted Stock Unit Activity

The following table summarizes RSU activity for the three months ended March 31, 2015:

	Number of Shares			Weighted Average Grant Date Fair Value
Unvested at December 31, 2014		80,179		$	3.40
Granted		19,848			4.62
Vested		(24,228	)		3.32
Forfeited		(8,976	)		3.15
Unvested at March 31, 2015		66,823		$	3.82
Expected to vest after March 31, 2015		61,842		$	3.82

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:

	March 31, 2015
Stock options outstanding		1,478,724
Restricted stock units outstanding		66,823
Stock awards available for future grant		689,460
Common stock reserved for future issuance		2,235,007