Note 11 - Contingencies (Details Textual)	3 Months Ended
	May 29, 2016 USD ($)	May 31, 2015 USD ($)
Number of Sites of Company or Subsidiaries That Have Been Named for Potential Environmental Remediation Liability	4
Accrual for Environmental Loss Contingencies	$ 0	$ 0
Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers	100.00%
Number of Insurance Carriers	3
Number of Units Covered Under General Liability Insurance Coverage	3
Litigation Settlement, Expense	$ 1,000	$ 1,000