RESTRUCTURING EXPENSE (Restructuring by Statement of Operations Location) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Restructuring Cost And Reserve [Line Items]
Total restructuring charges	$ 400	$ 391
Cost of product revenue
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		82
Cost of product service
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		74
General and administrative
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		28
Sales and marketing
Restructuring Cost And Reserve [Line Items]
Total restructuring charges		$ 207