Acquisition - Additional Information (Detail) (USD $)	12 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 IMCO Technologies Corporation [Member]	Dec. 31, 2012 IMCO Technologies Corporation [Member]	Dec. 31, 2012 IMCO Technologies Corporation [Member]	May 02, 2012 IMCO Technologies Corporation [Member]
Schedule Of Business Acquisitions Purchase Price Allocation [Line Items]
Total estimated consideration for acquisition					$ 3,700,000
Increase in goodwill				2,100,000
Increase in intangible assets				1,400,000
Amortization period of intangible assets				4 years
Reduction in expected future liability		200,000	200,000
Payments for royalties	$ 18,000