3. EARNINGS PER SHARE (''EPS'') (Details Narrative) - shares	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Employee Stock Purchase Plan
Options not included in the computation of diluted net (loss) income per share (in thousands)	192	297
Convertible Notes
Options not included in the computation of diluted net (loss) income per share (in thousands)			2,657
Stock Option
Options not included in the computation of diluted net (loss) income per share (in thousands)	3,153	3,107	1,313
Restricted Stock Units
Options not included in the computation of diluted net (loss) income per share (in thousands)	10	23