Segment and Geographic Area Information (Schedule of Segment Reporting Information) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021	Apr. 30, 2022
Segment Reporting Information [Line Items]
Net sales	$ 108,676,743	$ 100,216,614	$ 214,249,599	$ 185,956,048
Operating income	4,068,856	4,971,830	6,892,673	8,443,293
Gain on extinguishment of long-term debt				(6,282,973)
Other income	(35,814)	(36,562)	(71,630)	(73,703)
Interest expense, net	1,976,831	344,675	2,930,389	582,591
Income before income taxes	2,127,839	4,663,717	4,033,914	14,217,378
Purchases of machinery and equipment	736,455	1,054,729	1,871,453	4,666,433
Depreciation and amortization of property, machinery and equipment	1,467,286	1,417,645	2,919,066	2,773,922
Amortization of intangible assets	235,142	86,488	470,904	173,610
Identifiable assets	305,203,620	250,203,733	305,203,620	250,203,733	$ 293,631,277
Operating Segments [Member] | EMS Segment [Member]
Segment Reporting Information [Line Items]
Net sales	108,221,067	100,216,614	213,411,047	185,956,048
Operating income	6,799,982	4,971,830	11,847,360	8,443,293
Purchases of machinery and equipment	697,940	1,054,729	1,772,695	4,666,433
Depreciation and amortization of property, machinery and equipment	1,456,624	1,417,645	2,889,751	2,773,922
Amortization of intangible assets	84,628	86,488	169,876	173,610
Identifiable assets	281,517,954	$ 250,203,733	281,517,954	$ 250,203,733
Operating Segments [Member] | Pet Tech Segment [Member]
Segment Reporting Information [Line Items]
Net sales	455,676		838,552
Operating income	(2,731,126)		(4,954,687)
Purchases of machinery and equipment	38,515		98,758
Depreciation and amortization of property, machinery and equipment	10,662		29,315
Amortization of intangible assets	150,514		301,028
Identifiable assets	23,685,666		23,685,666
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	$ 644,097		$ 727,613