Income Taxes (Details Textual 3) (USD $) In Millions, unless otherwise specified	Dec. 30, 2012
Canada, Federal [Member] | Investment Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards subject to expiration	$ 32.5
State Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards subject to expiration	1.9
Tax credit carryforwards	2.5
Tax credit carryforwards not subject to expiration	0.6
Internal Revenue Service (IRS) [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards subject to expiration	$ 0.7