Note 11 - Geographic Regions - Financial Information by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2021	May 30, 2021	May 31, 2020	Feb. 28, 2021
Net sales	$ 13,594	$ 13,594	$ 12,213
Total long-lived assets		32,527		$ 31,171
North America [Member]
Net sales	13,073		11,746
Total long-lived assets		32,515		31,170
Asia [Member]
Net sales	142		189
Total long-lived assets		12		1
Europe [Member]
Net sales	$ 379		$ 278
Total long-lived assets