Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Net sales	$ 23,552,636	$ 28,274,696	$ 83,001,633	$ 84,167,208
Costs and expenses
Costs of goods sold	22,293,839	26,427,918	78,279,846	78,798,672
General, selling and administrative costs	976,330	1,121,986	3,407,757	3,472,545
Costs and Expenses, Total	23,270,169	27,549,904	81,687,603	82,271,217
Interest and other income	(15,250)	(15,501)	(45,784)	(46,508)
Earnings before income taxes	297,717	740,293	1,359,814	1,942,499
Provision for (benefit from) income taxes:
Current	137,591	275,970	617,247	768,149
Deferred	(27,517)	(23,145)	(92,482)	(149,136)
Income Tax Expense (Benefit), Total	110,074	252,825	524,765	619,013
Net earnings	$ 187,643	$ 487,468	$ 835,049	$ 1,323,486
Weighted average number of common shares outstanding:
Basic	6,799,444	6,799,444	6,799,444	6,799,444
Diluted	6,799,444	6,799,444	6,799,444	6,799,444
Net earnings per share:
Basic	$ 0.03	$ 0.07	$ 0.12	$ 0.19
Diluted	$ 0.03	$ 0.07	$ 0.12	$ 0.19
Cash dividends declared per common share	$ 0.02	$ 0.02	$ 0.06	$ 0.18