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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 28, 2012
Dec. 30, 2011
Dec. 31, 2010
Current tax provision:      
U.S. federal $ 0 $ 0 $ 0
State 11 13 13
Foreign 1,125 1,012 602
Total current provision 1,136 1,025 615
Deferred tax provision:      
U.S. federal and state 0 0 0
Foreign 108 331 (183)
Total deferred provision 143 367 253
Provision for income taxes $ 1,244 $ 1,356 $ 432