Business and Credit Concentrations (Tables)

12 Months Ended

Dec. 31, 2013

Risks and Uncertainties [Abstract]

Schedule of significant portions of the Company's net sales

Significant portions of the Company’s net sales are as follows:

	Year Ended December 31,
	2013		2012		2011
Net sales to foreign customers outside the U.S. and Canada	37	%	40	%	29	%
Net sales to SANG	12	%	11	%	*
Net sales to General Dynamics Land Systems-Canada	*		*		11	%