Note 11 - Leases and Commitments (Details Textual) $ in Thousands	12 Months Ended			15 Months Ended
	Mar. 01, 2020 USD ($)	Mar. 03, 2019 USD ($)	Feb. 25, 2018 USD ($)	Mar. 01, 2020 USD ($)	Dec. 31, 2018 ft²
Operating Lease, Expense	$ 318
Operating Lease, Payments	$ 309
Operating Lease, Weighted Average Remaining Lease Term (Year)	5 years 317 days			5 years 317 days
Operating Lease, Expense, Including Real Estate Taxes and Other Costs	$ 368	$ 346	$ 432
Additional Manufacturing Facility [Member]
Area of Land (Square Foot) | ft²					90,000
Construction in Progress Expenditures Incurred but Not yet Paid				$ 21,000
Purchase Obligation, Total	997			997
Construction in Progress Expenditures Incurred but Not yet Paid	7,647
Accrued Liabilities, Current [Member]
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 334			$ 334
Minimum [Member]
Lessee, Operating Lease, Renewal Term (Year)	1 year			1 year
Maximum [Member]
Lessee, Operating Lease, Renewal Term (Year)	10 years			10 years