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Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2012

Stock Based Compensation [Abstract]

Activity in stock option plan

		Number of Shares				Weighted Average Exercise Price Per Share				Aggregate Intrinsic Value (thousands)
Outstanding at December 31, 2011			1,766,401			$	3.63
Granted			113,550			$	4.10
Exercised			(136,091	)		$	2.67
Canceled or forfeited			(45,305	)		$	4.62
Outstanding at June 30, 2012			1,698,555			$	3.71			$	1,594

Weighted average assumptions for fair value estimate of stock-based awards

		Three Months Ended								Six Months Ended
		June 30, 2012				July 2, 2011				June 30, 2012				July 2, 2011
Average risk free interest rate			0.68	%			1.51	%			0.70	%			1.85	%
Expected life (in years)			4.55 years				4.75 years				4.55 years				4.75 years
Dividend yield			0.0	%			0.0	%			0.0	%			0.0	%
Average volatility			91	%			91	%			91	%			91	%

Stock-based compensation expense

		Three Months Ended								Six Months Ended
		June 30, 2012				July 2, 2011				June 30, 2012				July 2, 2011
Cost of revenues		$	16			$	14			$	34			$	28
Research and development			20				16				39				36
Sales and marketing			26				29				55				56
General and administrative			88				45				169				99
		$	150			$	104			$	297			$	219

Stock options outstanding, exercisable and expected to vest

		Number of Shares				Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (Years)				Aggregate Intrinsic Value (thousands)
Options outstanding			1,698,555			$	3.71				3.56			$	1,594
Options vested and expected to vest			1,583,062			$	3.72				3.39			$	1,514
Options exercisable			1,206,552			$	3.76				2.59			$	1,292

Restricted stock units outstanding, vested and expected to vest

		Number of Shares				Weighted Average Remaining Contractual Life (years)				Aggregate Intrinsic Value (thousands)
Restricted stock units outstanding			95,189				1.66			$	397
Restricted stock units vested and expected to vest			75,443				1.24			$	315

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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Tabular disclosure of the number, aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both restricted stock units outstanding and restricted stock units fully vested and expected to vest at the date of the latest statement of financial position.

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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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Tabular disclosure of the following for fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position: the number, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term of options (or share units) currently exercisable (or convertible).

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