Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net earnings	$ 808,359	$ 2,091,854
Adjustments to reconcile net earnings to cash provided by (used in) operating activities:
Depreciation	456,898	450,297
Provision for deferred taxes	(102,845)	(27,652)
Change in postretirement benefits	22,353	22,354
Decrease (increase) in operating assets:
Accounts receivable	579,356	4,645,039
Inventories	7,197,984	1,913,505
Other current assets	92,311	79,393
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	(6,851,767)	(7,157,273)
Contribution to profit sharing plan	52,500	52,500
Employee compensation and related expenses	(62,729)	10,588
Income taxes payable		842,471
Deferred credit for LIFO inventory replacement	54,625
NET CASH PROVIDED BY OPERATING ACTIVITIES	2,247,045	2,923,076
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(14,590)	(90,573)
Proceeds from sales of assets		42,375
Increase in cash surrender value of officers' life insurance	(15,500)	(15,500)
NET CASH USED IN INVESTING ACTIVITIES	(30,090)	(63,698)
FINANCING ACTIVITIES
Cash dividends paid	(543,956)	(883,928)
NET CASH USED IN FINANCING ACTIVITIES	(543,956)	(883,928)
INCREASE IN CASH	1,672,999	1,975,450
Cash at beginning of period	15,923,294	11,881,548
CASH AT END OF PERIOD	$ 17,596,293	$ 13,856,998