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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details Narrative) - USD ($)
$ in Thousands
Nov. 30, 2020
May 31, 2020
Fair Value Disclosures [Abstract]    
Restricted cash representing a security deposit $ 80 $ 80
Financial liabilities at fair value 0 $ 0
Transfers between Level 1 and Level 2 fair value measurements $ 0