CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	May 31, 2016	May 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:	$ (1,106,900)	$ 82,800
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(1,263,000)	(118,900)
Net cash used in investing activities	(1,263,000)	(118,900)
CASH FLOWS FROM FINANCING ACTIVITIES:
Cash paid to acquire treasury stock	0	(200)
Cash received from sales of treasury stock	45,600	45,800
Borrowings under line of credit	10,627,700	300,000
Payments under line of credit	(8,040,800)	0
Payments on long-term debt	(149,600)	0
Dividends paid	(366,300)	(322,000)
Net cash provided by financing activities	2,116,600	23,600
NET DECREASE IN CASH AND CASH EQUIVALENTS	(253,300)	(12,500)
CASH AND CASH EQUIVALENTS—BEGINNING OF PERIOD	1,183,700	383,900
CASH AND CASH EQUIVALENTS—END OF PERIOD	930,400	371,400
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	216,500	15,800
Cash paid for income taxes	$ 716,200	$ 71,500