Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
OPERATING ACTIVITIES
Net earnings	$ 1,323,486	$ 4,886,241
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation	1,368,300	1,340,697
Provision for deferred taxes	(149,136)	(69,513)
Provision for postretirement benefits	52,430	67,059
Decrease (increase) in operating assets:
Accounts receivable, net	4,098,851	9,596,924
Inventories	1,191,698	3,846,976
Other	(135,912)	(748,028)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	(4,478,860)	(7,464,299)
Contribution to profit-sharing plan	157,500	157,500
Employee compensation and related expenses	(215,890)	(272,218)
Income taxes payable		(98,464)
NET CASH PROVIDED BY OPERATING ACTIVITIES	3,212,467	11,242,875
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(368,097)	(466,218)
Proceeds from sales of assets		42,375
Increase in cash surrender value of officers' life insurance	(46,500)	(46,500)
NET CASH USED IN INVESTING ACTIVITIES	(414,597)	(470,343)
FINANCING ACTIVITIES
Cash dividends paid	(1,631,868)	(6,051,505)
NET CASH USED IN FINANCING ACTIVITIES	(1,631,868)	(6,051,505)
INCREASE IN CASH	1,166,002	4,721,027
Cash at beginning of period	15,923,294	11,881,548
CASH AT END OF PERIOD	$ 17,089,296	$ 16,602,575