Business Segments and Major Customers (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Revenue From External Customers By Geographical Areas [Line Items]
Revenues	$ 16,237	$ 14,010
United States [Member]
Revenue From External Customers By Geographical Areas [Line Items]
Revenues	7,946	8,910
United Kingdom [Memebr]
Revenue From External Customers By Geographical Areas [Line Items]
Revenues	7,761	4,360
Other Location [Member]
Revenue From External Customers By Geographical Areas [Line Items]
Revenues	$ 530	$ 740