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Schedule of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Apr. 30, 2022
Apr. 30, 2021
Accounting Policies [Abstract]    
Cash and cash equivalents $ 7,885 $ 83,028
Restricted cash- short term 258 384
Restricted cash- long term 219 222
Cash, cash equivalents, restricted cash and restricted cash equivalents $ 8,362 $ 83,634