3. EARNINGS PER SHARE (''EPS'') (Details Narrative) - shares	12 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2019
Employee Stock Purchase Plan
Options not included in the computation of diluted net loss per share (in thousands)	239	192	297
Stock Option
Options not included in the computation of diluted net loss per share (in thousands)	2,766	3,153	3,107
Restricted Stock Units
Options not included in the computation of diluted net loss per share (in thousands)	132	10	23