Employee Benefit Plans Stock Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity

The following table summarizes stock option activity for 2013 (in thousands, except average prices and weighted average remaining contractual lives):

	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Balance, December 31, 2012	2,555		$	7.84	3.76	$	482
Granted	1,746		3.46
Exercised	(43	)	0.67
Forfeited	(119	)	4.06
Expired	(674	)	11.59
Balance, December 31, 2013	3,465		$	5.15	4.65	$	211
Options exercisable at December 31, 2013	1,301		$	7.75	2.87	$	203
Options vested as of December 31, 2013 and expected to vest after December 31, 2013	3,339		$	5.21	4.61	$	211

Schedule of Nonvested Share Activity

The following table summarizes nonvested stock activity for 2013:

	Restricted Stock Units				LTIP and Overlay Awards
	Restricted Shares		Weighted Average Fair Value		Restricted Shares		Weighted Average Fair Value
Balance, December 31, 2012	527		$	5.65	1,003		$	2.19
Granted	102		3.71		130		4.37
Vested	(231	)	6.15		(186	)	2.27
Forfeited	(63	)	5.28		(151	)	4.19
Balance, December 31, 2013	335		$	4.73	796		$	5.00

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

The following table summarizes shares issued under the ESPP (in thousands, except per share amounts):

	Year Ended December 31,
	2013		2012		2011
Shares issued pursuant to the ESPP	381		352		251
Cash received for the purchase of shares pursuant to the ESPP	$	767	$	1,225	$	1,572
Weighted average purchase price per share	$	2.01	$	3.48	$	6.27

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value calculations for stock options and ESPP shares used the following assumptions for the years ended December 31:

	Stock Options									Assumed Options			Employee Stock Purchase Plan
	2013			2012			2011			2011			2013			2012			2011
Estimated fair value	$	3.45		$	2.10		$	4.23		$	7.77		$	1.79		$	2.05		$	2.09
Expected life (in years)	4.5			4.5			4.4			2.7			1.5			1.5			1.5
Interest rate	1.33		%	0.65		%	0.91		%	0.66		%	0.15		%	0.18		%	0.12		%
Volatility	57		%	71		%	70		%	64		%	52		%	53		%	42		%
Dividend yield	—			—			—			—			—			—			—

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

For the years ended December 31, 2013, 2012 and 2011, stock-based compensation was recognized and allocated in the Consolidated Statements of Operations as follows (in thousands):

	2013		2012		2011
Cost of sales	$	550	$	25	$	838
Research and development	1,170		601		1,434
Selling, general and administrative	3,578		765		3,445
Total stock-based compensation expense	$	5,298	$	1,391	$	5,717