Amount of the cost of borrowed funds accounted for as interest expense.

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Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Note 5 - Long-term Debt (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
Note 5 - Long-term Debt (Details Textual) - USD ($)	Jan. 15, 2016	Aug. 26, 2018	Aug. 27, 2017	Aug. 26, 2018	Aug. 27, 2017
Interest Expense, Total		$ 0	$ 603,000	$ 0	$ 1,113,000
HSBC Bank USA [Member] \| Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000
HSBC Bank USA [Member] \| Revolving Credit Facility [Member]
Debt Instrument, Term	3 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 75,000,000