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Schedule of Right-of Use Assets and Lease Liabilities (Details) - USD ($)
$ in Thousands
Oct. 31, 2021
Apr. 30, 2021
Leases    
Operating right-of-use asset, net $ 897 $ 1,036
Right-of-use liability- current 327 347
Right-of-use liability- long term 690 $ 819
Total lease liability $ 1,017  
Weighted average remaining lease term- operating leases 2 years 10 months 9 days  
Weighted average discount rate- operating leases 8.20%