Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net sales	$ 18,317,506	$ 23,165,705	$ 40,711,270	$ 47,134,273
Costs and expenses
Costs of goods sold	18,363,217	22,258,002	42,009,969	44,084,677
General, selling and administrative costs	915,829	1,212,836	2,008,579	2,566,292
Costs and expenses, total	19,279,046	23,470,838	44,018,548	46,650,969
Interest and other income	(14,750)	(17,250)	(29,500)	(34,500)
Earnings (loss) before income taxes	(946,790)	(287,883)	(3,277,778)	517,804
Provision for (benefit from) income taxes:
Current	154,995	(130,167)	(673,618)	113,993
Deferred taxes	(497,903)	35,578	(539,059)	71,156
Income tax	(342,908)	(94,589)	(1,212,677)	185,149
Net earnings (loss)	$ (603,882)	$ (193,294)	$ (2,065,101)	$ 332,655
Weighted average number of common shares outstanding:
Basic (in shares)	6,799,444	6,799,444	6,799,444	6,799,444
Diluted (in shares)	6,799,444	6,799,444	6,799,444	6,799,444
Net earnings (loss) per share:
Basic (in dollars per share)	$ (0.09)	$ (0.03)	$ (0.30)	$ 0.05
Diluted (in dollars per share)	(0.09)	(0.03)	(0.30)	0.05
Cash dividends declared per common share (in dollars per share)	$ 0.01	$ 0.01	$ 0.02	$ 0.02