Note 11 - Contingencies (Details Textual)	9 Months Ended
	Nov. 26, 2017
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
Number of Insurance Carriers	3