Note 11 - Contingencies (Details Textual)	3 Months Ended		6 Months Ended
	Aug. 28, 2016 USD ($)	Aug. 30, 2015 USD ($)	Aug. 28, 2016 USD ($)	Aug. 30, 2015 USD ($)	Feb. 28, 2016 USD ($)
Number of Sites of Company or Subsidiaries That Have Been Named for Potential Environmental Remediation Liability	4
Percentage of Legal Defense and Remediation Costs Associated with Sites Reimbursed by Insurance Carriers	100.00%
Number of Units Covered Under General Liability Insurance Coverage	3
Litigation Settlement, Expense	$ 1,000	$ 1,000	$ 1,000	$ 2,000
Accrual for Environmental Loss Contingencies	$ 0		$ 0		$ 0
Number of Insurance Carriers	2