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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2014

Stock-Based Compensation [Abstract]

Compensation costs related to stock-based awards

The following table summarizes compensation costs related to our stock-based awards (in thousands, except per share data):

		Three Months Ended June 30,								Six Months Ended June 30,
		2014				2013				2014				2013
Cost of revenue		$	5			$	5			$	10			$	11
Selling, general and administrative			245				291				489				575
Research and development			47				42				90				84
Total stock-based compensation			297				338				589				670
Tax effect on stock-based compensation			—				—				—				—
Net effect on net income (loss)		$	297			$	338			$	589			$	670

Weighted-average assumptions

The fair value of our stock options granted to employees for the three and six months ended June 30, 2014 was estimated using the following weighted-average assumptions:

		Three Months Ended				Six Months Ended
		June 30, 2014				June 30, 2014
Expected term (in years)			4.0				4.0
Volatility			66.32	%			66.32	%
Expected dividend			0	%			0	%
Risk-free interest rate			1.98	%			1.98	%

Summary of stock option activity

The following table summarizes the stock option transactions during the six months ended June 30, 2014 (in thousands, except per share data):

Stock Options		Shares				Weighted- average Exercise Price				Weighted- average Remaining Contractual Life (in years)				Aggregate Intrinsic Value
Balance as of January 1, 2014			2,671			$	3.29				6.71			$	893
Granted			52				2.14
Exercised			(5	)			1.29
Canceled and expired			(73	)			5.18
Balance as of June 30, 2014			2,645			$	3.22				6.48			$	383
Options vested and expected to vest as of June 30, 2014			2,645			$	3.22				6.48			$	383
Options exercisable as of June 30, 2014			1,729			$	3.35				5.29			$	383

Restricted stock awards

Restricted stock awards

A summary of activity related to restricted stock awards for the six months ended June 30, 2014 is presented below:

Stock Awards		Shares				Weighted-Average Grant Date Fair Value
Non-vested as of January 1, 2014			241,232			$	3.44
Granted			55,044			$	2.18
Vested			(30,320	)		$	3.96
Non-vested as of June 30, 2014			265,956			$	3.12

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Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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