4. EARNINGS PER SHARE (Details Narrative) - shares	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Employee Stock Purchase Plan
Options not included in the computation of diluted net income (loss) per share (in thousands)		297
Stock Options
Options not included in the computation of diluted net income (loss) per share (in thousands)	2,594	3,434
Restricted Stock Units
Options not included in the computation of diluted net income (loss) per share (in thousands)		20