Assets Held for Sale (Details) - Disclosure of Long Lived Assets Held-for-sale - USD ($) $ in Thousands	Apr. 30, 2020	Apr. 30, 2019
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