Sales Contract Liability (Details) - USD ($) $ in Thousands	6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020
Movement In Contract With Customer, Liability [Roll Forward]
Balance at February 28/29,	$ 16,138	$ 18,418
Contract liabilities added during the period	4,191	2,738
Sales recognized during the period	(6,600)	(7,400)
Balance at August 31,	$ 13,729	$ 13,756