REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Accounts receivable, net	$ 37,811	$ 20,181
Contract assets, current	10,425	5,717
Contract assets, non-current	13,698	0
Deferred revenue, current	7,105	3,336
Deferred revenue, non-current	$ 1,119	$ 6