Condensed Consolidated Statements Of Cash Flows - USD ($)	6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities
Net income	$ 1,118,997	$ 179,892
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	2,560,202	2,515,400
Stock-based compensation	83,659	169,963
Restricted stock expense		10,274
Deferred income tax expense (benefit)	(331,312)	152
Amortization of intangible assets	220,075	244,280
Amortization of financing fees	23,757	22,475
Fair value adjustment of contingent consideration	32,201	(96,627)
Loss from disposal or sale of machinery and equipment	191	29,819
Changes in assets and liabilities
Accounts receivable	42,462	(3,396,989)
Inventories	(7,384,393)	(2,305,356)
Prepaid expenses and other assets	1,458,244	820,534
Refundable income taxes	(219,550)	(118,820)
Income taxes payable	183,537	55,496
Trade accounts payable	609,465	1,308,064
Deferred rent	(117,920)	(100,509)
Accrued expenses and wages	(1,089,676)	(651,825)
Net cash used in operating activities	(2,810,061)	(1,313,777)
Cash flows from investing activities
Purchases of machinery and equipment	(3,232,111)	(1,901,654)
Net cash used in investing activities	(3,232,111)	(1,901,654)
Cash flows from financing activities
Advances on notes receivable	(315,000)
Proceeds from the exercise of common stock options	42,940	4,320
Proceeds from Employee stock purchases		8,347
Proceeds under equipment note	943,136
Payments of contingent consideration	(112,151)	(144,154)
Payments under capital lease and sale leaseback agreements	(966,579)	(815,127)
Payments under equipment note	(125,085)
Payments under building notes payable	(82,500)	(82,500)
Borrowings under lines of credit	9,298,262	41,780,402
Payments under lines of credit	(3,675,691)	(38,540,132)
Payments of financing fees	(14,632)
Net cash provided by financing activities	4,992,700	2,211,156
Change in cash and cash equivalents	(1,049,472)	(1,004,275)
Cash and cash equivalents at beginning of period	3,493,324	4,325,268
Cash and cash equivalents at end of period	2,443,852	3,320,993
Supplementary disclosures of cash flow information
Cash paid for interest	571,537	520,012
Cash paid for income taxes	987,734	212,592
Purchase of machinery and equipment financed under capital leases	2,085,149	1,159,851
Financing of insurance policy	$ 49,500	$ 271,113