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Assets Held for Sale (Details) - Disclosure of Long Lived Assets Held-for-sale - USD ($) $ in Thousands | Apr. 30, 2020 | Apr. 30, 2019
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Disclosure of Long Lived Assets Held-for-sale [Abstract] |  |
Cash and cash equivalents | $ 0 | $ 35
Accounts receivable, net |  | 348
Inventories, net |  | 876
Other current assets |  | 88
Property, plant and equipment, net |  | 202
Total assets held for sale |  | 1,549
Accounts payable – trade |  | 707
Accrued liabilities |  | 315
Other current liabilities |  | 56
Other liabilities |  | 2,253
Total liabilities held for sale |  | $ 3,331

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