Note 5 - Long-term Debt (Details Textual) - USD ($)		3 Months Ended
Jan. 15, 2016	May 27, 2018	May 28, 2017
Interest Expense, Total		$ 0	$ 510,000
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

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

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