INTANGIBLE ASSETS AND GOODWILL - Narrative (Details) $ in Millions	6 Months Ended
	Sep. 30, 2021 USD ($)
Developed technology
Finite-Lived Intangible Assets [Line Items]
Fully amortized intangible asset written off	$ 6.7
Finite-lived intangible assets, remaining amortization period	4 years 4 months 24 days
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Fully amortized intangible asset written off	$ 5.5
Finite-lived intangible assets, remaining amortization period	4 years 8 months 12 days
Trade and domain names
Finite-Lived Intangible Assets [Line Items]
Fully amortized intangible asset written off	$ 0.9