Consolidated Statements Of Operations (USD $)	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Consolidated Statements Of Operations [Abstract]
Net sales	$ 54,947,477	$ 56,166,061
Cost of products sold	50,201,029	49,877,653
Gross profit	4,746,448	6,288,408
Selling and administrative expenses	4,514,211	4,855,558
Operating income	232,237	1,432,850
Other income	(39,876)	(21,449)
Interest expense	256,547	213,960
Income from operations before income tax (benefit) expense	15,566	1,240,339
Income tax (benefit) expense	(1,244)	272,875
Net income	$ 16,810	$ 967,464
Earnings per share - basic	$ 0.00	$ 0.24
Earnings per share - diluted	$ 0.00	$ 0.24
Weighted average shares of common stock outstanding Basic	4,028,535	3,961,232
Weighted average shares of common stock outstanding Diluted	4,105,627	4,011,001