FIXED ASSETS (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 267,630	$ 258,788
Less – accumulated depreciation	(226,293)	(210,314)
Fixed assets, net	41,337	48,474
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 9,757	9,742
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	7 years
Computer equipment and internal use software
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Fixed assets, gross	$ 185,177	177,098
Computer equipment and internal use software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Computer equipment and internal use software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Fixed assets, gross	$ 54,442	53,980
Demonstration and spare part units
Property, Plant and Equipment [Line Items]
Fixed assets, gross	$ 18,254	$ 17,968
Demonstration and spare part units | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	2 years
Demonstration and spare part units | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	5 years