Note 4 - Income Taxes - Open Tax Years by Major Jurisdiction (Details)	12 Months Ended
	Feb. 26, 2023
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Earliest Tax Year [Member]
Open tax year	2021
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Open tax year	2023
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Earliest Tax Year [Member]
Open tax year	2020
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member] | Latest Tax Year [Member]
Open tax year	2023
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | Earliest Tax Year [Member]
Open tax year	2021
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member] | Latest Tax Year [Member]
Open tax year	2023
State and Local Jurisdiction [Member] | Kansas Department of Revenue [Member] | Earliest Tax Year [Member]
Open tax year	2021
State and Local Jurisdiction [Member] | Kansas Department of Revenue [Member] | Latest Tax Year [Member]
Open tax year	2023
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member] | Earliest Tax Year [Member]
Open tax year	2021
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member] | Latest Tax Year [Member]
Open tax year	2023
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member] | Earliest Tax Year [Member]
Open tax year	2020
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member] | Latest Tax Year [Member]
Open tax year	2023