INTANGIBLE ASSETS AND GOODWILL - Carrying Value of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 46,885	$ 46,324
Accumulated Amortization	(28,459)	(22,323)
Net Carrying Amount	18,426	24,001
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,969	33,932
Accumulated Amortization	(20,391)	(16,312)
Net Carrying Amount	13,578	17,620
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,927	11,409
Accumulated Amortization	(7,079)	(5,412)
Net Carrying Amount	4,848	5,997
Trade and domain names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	989	983
Accumulated Amortization	(989)	(599)
Net Carrying Amount	$ 0	$ 384