Consolidated Statements of Earnings (USD $)	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Net sales	$ 108,322,780us-gaap_SalesRevenueGoodsNet	$ 116,149,022us-gaap_SalesRevenueGoodsNet
Costs and expenses:
Cost of products sold	103,244,712us-gaap_CostOfGoodsSold	109,086,539us-gaap_CostOfGoodsSold
Selling, general and administrative	4,453,292	4,587,787
Costs and Expenses, Total	107,698,004us-gaap_CostsAndExpenses	113,674,326us-gaap_CostsAndExpenses
Operating profit (loss)	624,776us-gaap_OperatingIncomeLoss	2,474,696us-gaap_OperatingIncomeLoss
Interest and other income	61,040us-gaap_InterestAndOtherIncome	62,012us-gaap_InterestAndOtherIncome
EARNINGS BEFORE INCOME TAXES	685,816	2,536,708
Income taxes:
Current	680,842us-gaap_CurrentIncomeTaxExpenseBenefit	996,063us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred	(377,356)us-gaap_DeferredIncomeTaxExpenseBenefit	(172,281)us-gaap_DeferredIncomeTaxExpenseBenefit
Income Tax Expense (Benefit), Total	303,486us-gaap_IncomeTaxExpenseBenefit	823,782us-gaap_IncomeTaxExpenseBenefit
NET EARNINGS	$ 382,330us-gaap_NetIncomeLoss	$ 1,712,926us-gaap_NetIncomeLoss
Weighted average number of common shares outstanding:
Basic	6,799,444	6,799,444
Diluted	6,799,444	6,799,444
Net earnings per share:
Basic	$ 0.06us-gaap_EarningsPerShareBasic	$ 0.25us-gaap_EarningsPerShareBasic
Diluted	$ 0.06us-gaap_EarningsPerShareDiluted	$ 0.25us-gaap_EarningsPerShareDiluted

Total costs related to goods produced and sold during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

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