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LEASES (Details Narrative) - USD ($)
$ in Thousands
6 Months Ended
Nov. 30, 2020
May 31, 2021
Operating lease, right-of-use asset $ 1,200 $ 1,224
Operating lease, liability, current 257 232
Operating lease, liability, noncurrent 828 $ 905
Sales-type lease term   3 years
Sales-type lease unguaranteed residual asset   $ 0
Wilmington/Andover, Massachusetts [Member]    
Allowance for tenant improvements   200
Base rent   $ 100
Lease expiration date   Aug. 31, 2026
South Africa [Member]    
Base rent $ 4 $ 5
Lease expiration date   Nov. 30, 2024
Fort Wayne, Indiana [Member] | Lease Termination Agreement [Member]    
Lease expiration date   Feb. 28, 2022
Termination fee   $ 20
Fort Wayne, Indiana [Member]    
Base rent   $ 8
Lease expiration date   Jul. 31, 2025
Las Vegas, Nevada [Member]    
Base rent   $ 4
Lease expiration date   Aug. 31, 2022