Stock-based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

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

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

Stock-based compensation expense before income taxes for the three and nine-month periods ended September 30, 2013 and 2012 consisted of the following (in thousands):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2013		2012		2013		2012
Cost of goods sold	$	18	$	49	$	98	$	190
Research and development	20		26		69		93
Selling, general, and administrative	251		354		905		1,171
Stock-based compensation expense before income taxes	$	289	$	429	$	1,072	$	1,454

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

During the three and nine-month periods ended September 30, 2013, we granted awards representing 172,500 and 347,500 shares, respectively, of our common stock. During the three and nine-month periods ended September 30, 2012, we granted awards representing 7,500 and 127,500 shares of common stock, respectively. We use the Black-Scholes methodology to value stock-based compensation expense for options. In applying the Black-Scholes methodology to our outstanding option grants, we used the following assumptions:

	Nine Months Ended
	September 30,
	2013	2012
Risk-free interest rate	0.65% - 1.16%	0.54% - 0.95%
Expected option life	4.2 - 6.0 years	4.2 - 6.0 years
Expected dividend yield	—	—
Expected price volatility	34.08% - 41.67%	42.01% - 44.56%