Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
OPERATING ACTIVITIES
Net earnings	$ 4,146,319	$ 3,219,568
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation	916,200	932,401
Deferred	(45,350)	(27,200)
Provision for postretirement benefits	38,098	47,456
Decrease (increase) in operating assets:
Accounts receivable, net	321,522	452,077
Inventories	8,419,817	(7,169,653)
Other	(155,823)	(136,600)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	899,242	2,919,533
Contribution to profit-sharing plan	100,200	111,000
Employee compensation and related expenses	(154,343)	296,925
Income taxes payable	(291,811)	263,672
Deferred credit for LIFO inventory replacement	30,981
NET CASH PROVIDED BY OPERATING ACTIVITIES	14,225,052	909,179
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(208,488)	(464,404)
Increase in cash surrender value of officers' life insurance	(30,500)	(28,000)
NET CASH USED IN INVESTING ACTIVITIES	(238,988)	(492,404)
FINANCING ACTIVITIES
Cash dividends paid	(1,631,867)	(339,972)
Principal payments on notes payable		(13,507)
NET CASH USED IN FINANCING ACTIVITIES	(1,631,867)	(353,479)
INCREASE IN CASH AND CASH EQUIVALENTS	12,354,197	63,296
Cash and cash equivalents at beginning of period	7,210,290	19,812,881
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 19,564,487	$ 19,876,177