Debt (Full-Recourse Factoring Arrangements) (Details)	Mar. 31, 2013 USD ($)	Mar. 31, 2013 EUR (€)	Dec. 30, 2012 USD ($)	Dec. 31, 2009
Debt Disclosure [Abstract]
Weighted average percentage of the face amount of receivables				92.40%
Full-recourse factoring arrangements	$ 815,000	€ 600,000	$ 942,000
Current portion of full-recourse factoring agreements	300,000	300,000
Long-term portion of full-recourse factoring agreements	$ 500,000	€ 300,000