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Note 2 - Prepaid Expenses and Other Assets (Details) - Prepaid Expenses and Other Current Assets (USD $)
In Thousands, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Mar. 29, 2014
Prepaid Expenses and Other Current Assets [Abstract]      
Prepaid rent $ 8,283us-gaap_PrepaidRent $ 7,848us-gaap_PrepaidRent $ 4,059us-gaap_PrepaidRent
Short-term investment 984us-gaap_ShortTermInvestments 1,121us-gaap_ShortTermInvestments  
Other 4,624us-gaap_OtherAssetsCurrent 6,642us-gaap_OtherAssetsCurrent 5,580us-gaap_OtherAssetsCurrent
$ 13,891us-gaap_PrepaidExpenseAndOtherAssetsCurrent $ 15,611us-gaap_PrepaidExpenseAndOtherAssetsCurrent $ 9,639us-gaap_PrepaidExpenseAndOtherAssetsCurrent