Note 11 - Contingencies (Details Textual) $ in Thousands	12 Months Ended
	Feb. 27, 2022 USD ($)
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	2
Accrual for Environmental Loss Contingencies, Ending Balance	$ 0
Number of Insurance Carriers	3