Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES
Net earnings	$ 2,091,854	$ 1,831,411
Adjustments to reconcile net earnings to cash provided by (used in) operating activities:
Depreciation	450,297	458,099
Provision for deferred taxes	(27,652)	(22,675)
Change in postretirement benefits	22,354	19,049
Decrease (increase) in operating assets:
Accounts receivable	4,645,039	1,224,754
Inventories	1,913,505	5,063,837
Other current assets	79,393	(87,985)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	(7,157,273)	1,993,091
Contribution to profit sharing plan	52,500	50,100
Employee compensation and related expenses	10,588	(278,833)
Income taxes payable	842,471	470,482
NET CASH PROVIDED BY OPERATING ACTIVITIES	2,923,076	10,721,330
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(90,573)	(163,970)
Proceeds from sales of assets	42,375
Increase in cash surrender value of officers' life insurance	(15,500)	(15,250)
NET CASH USED IN INVESTING ACTIVITIES	(63,698)	(179,220)
FINANCING ACTIVITIES
Cash dividends paid	(883,928)	(747,939)
NET CASH USED IN FINANCING ACTIVITIES	(883,928)	(747,939)
INCREASE IN CASH	1,975,450	9,794,171
Cash at beginning of period	11,881,548	7,210,290
CASH AT END OF PERIOD	$ 13,856,998	$ 17,004,461