Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Assumptions Used to Compute Share-Based Compensation Costs for Stock Options Granted

The assumptions used to compute the share-based compensation costs for the stock options granted during the years ended December 31, 2013, 2012 and 2011, respectively, using the Black-Scholes option pricing model, were as follows:

		Year Ended December 31,
		2013			2012			2011
Weighted average grant-date fair value of stock options	$	0.63		$	0.80		$	1.16
Assumptions
Risk-free interest rate (weighted average)		0.6	%		0.5	%		0.2	%
Expected dividend yield		-			-			-
Weighted average expected life (years)		4			4			1
Volatility (weighted average)		68.1	%		80.0	%		73.0	%
Forfeiture rate		11.4	%		13.7	%		-

Assumptions Used Estimate Fair Value of Employee Stock Purchase Plans

Following is a schedule of the shares purchased, the fair value per share, and the Black-Scholes model assumptions for each offering period:

		(Ending)
Offering Period Ended		March 31,			September 31,			March 31,			September 31,			March 31,
		2014			2013			2013			2012			2012
Shares purchased for offering period					19,490			18,594			8,052			44,666
Fair value per share	$	0.30		$	0.44		$	0.65		$	0.93		$	0.69
Assumptions
Risk-free interest rate (average)		0.40	%		0.11	%		0.14	%		0.14	%		0.50	%
Expected dividend yield		-			-			-			-			-
Weighted average expected life (years)		0.5			0.5			0.5			0.5			0.5
Volatility (average)		44.0	%		45.0	%		74.0	%		78.0	%		105.0	%

Stock-Based Non-Cash Compensation Expenses

Stock-based non-cash compensation expenses related to stock options, restricted stock grants and the ESPP were recorded in the financial statements as follows (in thousands):

		Year Ended December 31,
		2013		2012		2011
Cost of revenues	$	20	$	13	$	31
Selling and marketing		766		865		1,922
Research and development		809		765		1,198
General and administrative		1,938		2,306		3,379
Total non-cash stock compensation expense	$	3,533	$	3,949	$	6,530

Summary of Outstanding Stock Options and Related Activity

A summary of the Company’s stock options outstanding under the 2005 Plan as of December 31, 2013 and the activity during the years ended herein are as follows (in thousands except per share amounts):

				Weighted Ave.		Aggregate
	Shares			Exercise Price		Intrinsic Value
Outstanding as of December 31, 2010		2,706		$	11.69	$	-
(2,545 options exercisable at a weighted average exercise price of $11.54)
Granted (weighted average fair value of $1.16)		25		$	4.07
Exercised		(7	)	$	1.77
Cancelled		(557	)	$	14.04
Outstanding as of December 31, 2011		2,167		$	11.03	$	-
(2,167 options exercisable at a weighted average exercise price of $11.03)
Granted (weighted average fair value of $0.80)		826		$	1.39
Exercised		(32	)	$	0.50
Cancelled		(686	)	$	12.37
Outstanding as of December 31, 2012		2,275		$	7.02	$	-
(1,474 options exercisable at a weighted average exercise price of $10.09)
Granted (weighted average fair value of $0.63)		120		$	1.31
Exercised		-		$	-
Cancelled		(225	)	$	6.52
Outstanding as of December 31, 2013		2,170		$	6.76	$	-
Exercisable as of December 31, 2013		1,573		$	8.81	$	-
Vested and expected to vest at December 31, 2013		2,092		$	6.96	$	-

Summary of Outstanding Restricted Stock Awards and Related Activity

A summary of the Company’s restricted stock awards outstanding under the 2005 Plan as of December 31, 2013, and the activity during years ended therein, are as follows (in thousands):

	Number of shares			Weighted average grant date fair value
Unvested at December 31, 2010	1,604		$	7.23
Granted	1,000		$	8.86
Vested	(823	)	$	7.40
Cancelled and forfeited	(426	)	$	7.81
Unvested at December 31, 2011	1,355		$	3.21
Granted	995		$	2.64
Vested	(611	)	$	6.42
Cancelled and forfeited	(420	)	$	8.73
Unvested at December 31, 2012	1,319		$	4.60
Granted	1,495		$	1.70
Vested	(752	)	$	4.43
Cancelled and forfeited	(316	)	$	3.00
Unvested at December 31, 2013	1,746		$	2.48