Condensed Consolidated Statements of Cash flows (USD $)	9 Months Ended
Dec. 31, 2014	Dec. 31, 2013
OPERATING ACTIVITIES
Net earnings	$ 835,049us-gaap_NetIncomeLoss	$ 1,323,486us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to cash provided by (used in) operating activities:
Depreciation	1,367,550us-gaap_Depreciation	1,368,300us-gaap_Depreciation
Provision for deferred taxes	(92,482)us-gaap_DeferredIncomeTaxExpenseBenefit	(149,136)us-gaap_DeferredIncomeTaxExpenseBenefit
Provision for postretirement benefits	57,624	52,430
Decrease (increase) in operating assets:
Accounts receivable, net	4,307,687	4,098,851
Inventories	(15,531,519)us-gaap_IncreaseDecreaseInInventories	1,191,698us-gaap_IncreaseDecreaseInInventories
Other	(111,551)	(135,912)
Increase (decrease) in operating liabilities:
Accounts payable and accrued expenses	6,270,504	(4,478,860)
Contribution to profit-sharing plan	137,500	157,500
Employee compensation and related expenses	(174,349)	(215,890)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(2,933,987)	3,212,467
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(4,732,511)	(368,097)
Increase in cash surrender value of officers' life insurance	(45,750)	(46,500)
NET CASH USED IN INVESTING ACTIVITIES	(4,778,261)	(414,597)
FINANCING ACTIVITIES
Cash dividends paid	(407,967)us-gaap_PaymentsOfDividendsCommonStock	(1,631,868)us-gaap_PaymentsOfDividendsCommonStock
NET CASH USED IN FINANCING ACTIVITIES	(407,967)	(1,631,868)
INCREASE (DECREASE) IN CASH	(8,120,215)	1,166,002
Cash at beginning of period	15,081,024	15,923,294
CASH AT END OF PERIOD	$ 6,960,809	$ 17,089,296

Contribution to profit-sharing plan.

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