Income Tax (Deferred Tax Assets And Liabilities) (Details) - USD ($)	Apr. 30, 2022	Apr. 30, 2021
Deferred Tax Assets
Federal, foreign & state NOL carryforwards	$ 4,719,930	$ 1,034,428
Foreign tax credit	78,100	78,100
Property, plant & equipment	113,338
Reserves and accruals	1,247,046	1,147,851
Stock based compensation	426,655	388,647
Inventory	2,703,370	2,627,419
Other intangibles		829,559
Lease liabilities	2,909,748	2,881,193
Allowance for doubtful accounts	25,490	25,890
Other intangibles - foreign	11,536
Other	66,231	22,213
Federal benefit of state	16,800
Total gross deferred tax assets	12,318,244	9,035,300
Less: valuation allowance	(4,543,819)	(1,138,736)
Net deferred tax assets	7,774,425	7,896,564
Deferred Tax Liabilities
Other intangibles	(712,848)
Property, machinery & equipment	(3,539,648)	(2,934,496)
Prepaids	(464,706)	(454,648)
Operating Lease right-of-use assets	(2,779,092)	(2,808,571)
Federal benefit of state taxes		(51,706)
Total deferred tax liabilities	(7,496,294)	(6,249,421)
Deferred tax asset	856,863	1,647,143
Deferred tax liability	(578,732)
Net deferred tax asset	$ 278,131	$ 1,647,143