Significant Accounting Policies (Estimated Useful Life Of Property And Equipment) (Details)	12 Months Ended
	Dec. 31, 2011 years
Manufacturing And Engineering Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, minimum	3
Property and equipment, estimated useful lives, maximum	10
Office Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, minimum	3
Property and equipment, estimated useful lives, maximum	7
Buildings And Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, estimated useful lives, minimum	3
Property and equipment, estimated useful lives, maximum	39