2. EARNINGS PER SHARE (Details Narrative) - shares	3 Months Ended
	Aug. 31, 2018	Aug. 31, 2017
Employee Stock Purchase Plan
Options not included in the computation of diluted net (loss) income per share (in thousands)	359
Convertible Notes
Options not included in the computation of diluted net (loss) income per share (in thousands)	2,657	2,657
Stock Options
Options not included in the computation of diluted net (loss) income per share (in thousands)	3,189	140
Restricted Stock Units
Options not included in the computation of diluted net (loss) income per share (in thousands)	43