Consolidated Statements Of Cash Flows (USD $)	3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Cash flows from operating activities
Net income	$ 16,810	$ 967,464
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	1,210,235	1,172,137
Stock-based compensation	28,038	29,292
Restricted stock expense	1,746	5,236
Employee stock purchases	49,712
Deferred income tax benefit	(14,221)	(45,011)
Amortization of intangibles	101,514	87,246
Loss from disposal or sale of machinery and equipment		1,675
Changes in assets and liabilities
Accounts receivable	(499,255)	(99,385)
Inventories	(3,816,960)	(1,797,940)
Prepaid expenses and other assets	(379,438)	474,201
Income taxes payable/refundable	(466,051)	228,026
Trade accounts payable	3,834,672	1,365,181
Deferred rent	15,153	21,091
Accrued expenses and wages	(728,143)	(33,872)
Net cash (used in) provided by operating activities	(646,188)	2,375,341
Cash flows from investing activities
Purchases of machinery and equipment	(2,038,346)	(4,900,370)
Net cash used in investing activities	(2,038,346)	(4,900,370)
Cash flows from financing activities
Proceeds from the issuance of common stock options	6,120
Payments under capital lease and sale leaseback agreements	(191,307)	(56,440)
Payments under building notes payable	(37,749)	(24,999)
Net changes under lines of credit	(78,546)	763,208
Change in bank overdraft		33,066
Net cash (used in) provided by financing activities	(301,482)	714,835
Change in cash	(2,986,016)	(1,810,194)
Cash at beginning of period	5,440,319	4,607,731
Cash at end of period	2,454,303	2,797,537
Supplementary disclosures of cash flow information
Cash paid for interest	241,511	195,973
Cash paid for income taxes	104,110	4,200
Cash refunded for income taxes		(159,999)
Purchase of machinery and equipment financed under a capital lease	$ 108,971