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Schedule of Other Current Assets (Details) - USD ($)
$ in Thousands
Oct. 31, 2021
Apr. 30, 2021
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Deposits $ 37 $ 68
Other receivables 17 21
Prepaid insurance 130 194
Prepaid recruiting 135 12
Prepaid expenses- other 241 192
Other current assets $ 560 $ 487