Note 4 - Income Taxes - Open Tax Years by Major Jurisdiction (Details) - Earliest Tax Year [Member]	12 Months Ended
	Mar. 01, 2020
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open tax year	2018 2019 2020
State and Local Jurisdiction [Member] | California Franchise Tax Board [Member]
Open tax year	2017 2018 2019 2020
State and Local Jurisdiction [Member] | New York State Division of Taxation and Finance [Member]
Open tax year	2018 2019 2020
Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Open tax year	2017 2018 2019 2020
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Open tax year	2016 2017 2018 2019 2020