Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Fair Values of Equity Awards, Primarily Stock Option Grants Estimated with Weighted Average Assumptions

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

	Year Ended
	December 31,
	2014			2013
Dividend yield		0	%		0	%
Expected life	3.3 years			4.2 years
Expected volatility		59	%		61	%
Risk-free interest rate		1.3	%		0.9	%

Stock-Based Compensation Expense

The impact on our results of operations of recording stock-based compensation expense for the years ended December 31, 2014 and 2013 was as follows (in thousands, except per share amounts):

	Year Ended
	December 31,
	2014		2013
Cost of revenue—service	$	236	$	219
Selling, general and administrative		698		579
Research and development		48		100
Total stock-based compensation expense	$	982	$	898
Per basic and diluted share	$	0.08	$	0.08

Summary of Stock Option Activity

The following table summarizes stock option activity under the Plans for 2014 and 2013:

						Weighted
						Average
				Weighted		Remaining
				Average		Contractual		Aggregate
	Number of			Exercise		Life		Intrinsic
Stock Options	Shares			Price		(in years)		Value
Balance at January 1, 2013		1,539,618		$	3.55		4.24
Granted		328,080			3.03
Exercised		(31,925	)		2.49
Forfeited		(130,131	)		3.23
Expired		(190,021	)		4.58
Balance at December 31, 2013		1,515,621		$	3.36		3.93
Granted		848,208			3.53
Exercised		(393,128	)		2.50
Forfeited		(122,280	)		3.28
Expired		(295,061	)		4.34
Balance at December 31, 2014		1,553,360		$	3.50		7.04	$	1,820,452
Vested and expected to vest at December 31, 2014		1,441,285		$	3.49		6.88	$	1,706,553
Exercisable at December 31, 2014		571,589		$	3.44		4.04	$	786,385

Summary of Certain Information about Stock Options

The following table summarizes certain information about stock options for 2014 and 2013:

	Year Ended
	December 31,
	2014		2013
Weighted average grant-date fair value for options granted    during the year	$	1.73	$	1.59
Vested options in-the-money at December 31		443,309		734,130
Aggregate intrinsic value of options exercised	$	436,770	$	24,429

Summary of Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity under the Stock Plan for 2014 and 2013:

				Weighted
				Average
	Number of			Award
	Shares			Price
Unvested at December 31, 2012		236,513		$	4.95
Granted		128,838			2.75
Vested		(171,404	)		3.82
Forfeited		(6,565	)		6.80
Unvested at December 31, 2013		187,382		$	4.40
Granted		110,235			3.21
Vested		(159,565	)		3.68
Forfeited		(57,873	)		5.51
Unvested at December 31, 2014		80,179		$	3.40
Expected to vest after December 31, 2014		76,756		$	3.38

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 December 31, 2014 and 2013:

	December 31,
	2014		2013
Stock options outstanding		1,553,360		1,515,621
Restricted stock units outstanding		80,179		187,382
Stock options available for future grant		654,083		1,024,941
Common stock reserved for future issuance		2,287,622		2,727,944