PREPAID EXPENSES AND OTHER CURRENT ASSETS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Prepaid Expenses And Other Current Assets [Line Items]
Payroll tax credit		$ 1,587
Cost of revenue		90,471	$ 86,716	$ 113,718
General and administrative		11,680	11,262	11,184
Sales and marketing		11,628	10,341	11,113
Research and development		1,701	1,685	1,716
American Rescue Plan Act of 2021
Prepaid Expenses And Other Current Assets [Line Items]
Payroll tax credit	$ 1,600
General and administrative	300
Sales and marketing	400
Research and development	100
Product revenue
Prepaid Expenses And Other Current Assets [Line Items]
Cost of revenue		65,249	63,233	83,588
Product revenue | American Rescue Plan Act of 2021
Prepaid Expenses And Other Current Assets [Line Items]
Cost of revenue	700
Service revenue
Prepaid Expenses And Other Current Assets [Line Items]
Cost of revenue		$ 25,222	$ 23,483	$ 30,130
Service revenue | American Rescue Plan Act of 2021
Prepaid Expenses And Other Current Assets [Line Items]
Cost of revenue	$ 100