Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	May 31, 2021	May 31, 2020
Income Statement [Abstract]
Net sales	$ 3,610	$ 2,498
Cost of sales	1,946	1,642
Gross profit	1,664	856
Selling, general and administrative expenses	714	486
Operating income (loss)	950	370
Other income (loss):
Interest income	(20)	0
Dividend income	0	6
Realized gain (loss) on investments	27	15
Unrealized gain (loss) on investments	(20)	(22)
Other, net	90	0
Total other income (loss)	77	(1)
Net income	$ 1,027	$ 369
Net income per common share - basic and diluted	$ 0.49	$ 0.18
Weighted average common shares outstanding - basic and diluted	2,083,462	2,062,949