Stock-based Compensation (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 289,000	$ 429,000	$ 1,072,000	$ 1,454,000
Total remaining unrecognized compensation cost related to non-vested stock options	4,700,000		4,700,000
Total remaining unrecognized compensation cost related to non-vested stock options, recogniztion period			3 years 6 months 10 days
Stock awards granted	172,500	7,500	347,500	127,500
Expected dividend yield			0.00%	0.00%
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	18,000	49,000	98,000	190,000
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	20,000	26,000	69,000	93,000
Selling General And Administrative Stock Based Compensation Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense before income taxes	$ 251,000	$ 354,000	$ 905,000	$ 1,171,000
Minimum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Risk-free interest rate			0.65%	0.54%
Expected option life			4 years 2 months 12 days	4 years 2 months 12 days
Expected price volatility			34.08%	42.10%
Maximum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Risk-free interest rate			1.16%	0.95%
Expected option life			6 years	6 years
Expected price volatility			41.67%	44.56%