CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 5,107,000	$ 6,122,900
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation	1,054,100	1,085,100
Deferred income taxes, net	81,100	673,100
Provision for doubtful accounts	39,900	68,500
Provision for inventory valuation allowance	283,400	246,200
Share-based compensation expense	498,800	255,300
Changes in assets and liabilities:
Accounts receivable	(845,400)	(705,000)
Inventories	3,147,500	(4,441,700)
Prepaid expenses and other assets	583,600	(324,400)
Accounts payable	(2,221,100)	3,327,000
Accrued salaries and commissions, and other liabilities	1,173,700	2,384,300
Deferred revenues	(470,800)	364,300
Income taxes payable	591,000	(1,252,900)
Total adjustments	3,915,800	1,679,800
Net cash provided by operating activities	9,022,800	7,802,700
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property, plant and equipment	(402,200)	(1,360,500)
Net cash used in investing activities	(402,200)	(1,360,500)
CASH FLOWS FROM FINANCING ACTIVITIES
Payments on long-term debt	(719,400)	(702,100)
Cash received from sale of treasury stock	383,400	227,100
Cash used to purchase treasury stock	(1,253,700)	(31,900)
Dividends paid	(1,241,300)	(818,100)
Net cash used in financing activities	(2,831,000)	(1,325,000)
NET INCREASE IN CASH AND CASH EQUIVALENTS	5,789,600	5,117,200
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD	3,199,300	2,723,300
CASH AND CASH EQUIVALENTS - END OF PERIOD	8,988,900	7,840,500
SUPPLEMENTAL DISCLOSURE OF CASH FLOWS INFORMATION
Cash paid for interest	693,800	704,300
Cash paid for income taxes	$ 1,318,000	$ 2,859,100