Note 12 - Contingencies (Details Textual)	3 Months Ended		9 Months Ended
	Nov. 27, 2016 USD ($)	Nov. 29, 2015 USD ($)	Nov. 27, 2016 USD ($)	Nov. 29, 2015 USD ($)
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	$ 0	$ 0	$ 1,000	$ 2,000
Number of Insurance Carriers			3