RESTRUCTURING CHARGES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		15 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018	May 31, 2019
Restructuring Cost And Reserve [Line Items]
Restructuring charges	$ 2,272	$ 566	$ 2,272	$ 3,949	$ 10,300
Severance and employee related costs			1,063		5,300
Restructuring charges					5,000
Telematics Systems [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges	2,300		2,300
Severance and employee related costs	1,100		1,100
Restructuring charges	$ 1,200		1,200
Impairment reduction of right-of-use asset			$ 1,200
Canton, Massachusetts [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring charges					$ 4,500