Note 4 - Income Taxes - Open Tax Years by Major Jurisdiction (Details)	12 Months Ended
	Feb. 27, 2022
Earliest Tax Year [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open tax year	2020
Earliest Tax Year [Member] | State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Open tax year	2018
Earliest Tax Year [Member] | State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]
Open tax year	2020
Earliest Tax Year [Member] | State and Local Jurisdiction [Member] | Kansas Department of Revenue [Member]
Open tax year	2018
Earliest Tax Year [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Open tax year	2018
Earliest Tax Year [Member] | Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Open tax year	2017
Latest Tax Year [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open tax year	2022
Latest Tax Year [Member] | State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Open tax year	2022
Latest Tax Year [Member] | State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]
Open tax year	2022
Latest Tax Year [Member] | State and Local Jurisdiction [Member] | Kansas Department of Revenue [Member]
Open tax year	2022
Latest Tax Year [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Open tax year	2022
Latest Tax Year [Member] | Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Open tax year	2022