Condensed Consolidated Statements Of Cash Flows - USD ($)	6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Cash flows from operating activities
Net (loss) income	$ (273,808)	$ 1,022,208
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization of property, machinery and equipment	2,529,756	2,456,156
Amortization of right-of-use operating lease assets	1,064,327	1,080,505
Restricted stock expense	15,229
Deferred income tax expense	(147,816)	20,982
Amortization of intangible assets	177,424	181,750
Amortization of financing fees	76,248	55,498
Loss from disposal or sale of machinery and equipment	141,245	17,598
Changes in operating assets and liabilities
Accounts receivable	6,171,838	1,516,504
Inventories	3,239,189	14,164,330
Prepaid expenses and other assets	(423,910)	(43,197)
Refundable and prepaid income taxes	301,268	220,427
Income taxes payable	(66,904)	(17,485)
Trade accounts payable	(11,288,257)	(10,673,778)
Operating lease liabilities	104,135	459,112
Accrued expenses and wages	1,911,747	932,247
Net cash provided by operating activities	3,531,711	11,392,857
Cash flows from investing activities
Purchases of machinery and equipment	(2,470,920)	(588,334)
Advances on other receivables	(2,612,300)
Net cash used in investing activities	(5,083,220)	(588,334)
Cash flows from financing activities
Proceeds under equipment notes	2,397,015
Payments of contingent consideration		(57,537)
Payments under finance lease and sale leaseback agreements	(1,011,945)	(1,162,402)
Payments under equipment notes	(283,684)	(205,850)
Payments under building notes payable	(160,983)	(140,000)
Borrowings under revolving line of credit	164,562,061	170,235,836
Payments under revolving line of credit	(165,448,281)	(176,963,048)
Payments of debt financing costs	(326,081)	(46,866)
Net cash used in financing activities	(271,898)	(8,339,867)
Change in cash and cash equivalents	(1,823,407)	2,464,656
Cash and cash equivalents at beginning of period	6,779,445	1,005,810
Cash and cash equivalents at end of period	4,956,038	3,470,466
Supplementary disclosures of cash flow information
Cash paid for interest	624,959	1,053,706
Cash paid for income taxes	134,355	391,949
Purchase of machinery and equipment financed under finance leases		671,446
Financing of insurance policy	$ 302,074	$ 54,000