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Discontinued Operations - results of operations (Details) - USD ($) | 3 Months Ended
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Jul. 31, 2023 | Jul. 31, 2022
Discontinued Operations and Disposal Groups [Abstract] |  |
Revenues | $ 1,869,219 | $ 1,942,720
Cost of goods sold | 1,385,116 | 1,667,213
Gross margin | 484,103 | 275,507
Operating expenses |  |
Operations | 209,980 | 161,783
Research and development | 46,249 | 82,806
Sales and marketing | 404,104 | 195,278
General and administrative | 43,606 | 55,161
Total operating expenses | 703,939 | 495,028
Operating loss | (219,836) | (219,521)
Other (income) expense |  |
Interest expense | 22,856 |
Other, net | (119) | (124)
Other (income) expense | 22,737 | (124)
Net loss from discontinued operations | $ (242,573) | $ (219,397)

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