REVENUES BY PRODUCT CATEGORY AND GEOGRAPHIC REGION AND SIGNIFICANT CONCENTRATIONS, Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 58,258	$ 57,696
North America [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	46,969	46,773
Europe [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,305	8,358
Asia Pacific and Rest of the World [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,984	$ 2,565