TOTAL VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Valuation and qualifying accounts
Balance at Beginning of Year	$ (21,146)	$ (18,824)
Balance at End of Year	(26,516)	(21,146)	$ (18,824)
Allowance for doubtful accounts
Valuation and qualifying accounts
Balance at Beginning of Year	(6,989)	(5,073)	(3,487)
Additions	(3,052)	(3,498)	(2,849)
Deductions	311	1,582	1,263
Balance at End of Year	(9,730)	(6,989)	(5,073)
Allowance for sales discounts
Valuation and qualifying accounts
Balance at Beginning of Year	(1,030)	(710)	(1,400)
Additions	(16,414)	(14,845)	(11,712)
Deductions	14,428	14,525	12,402
Balance at End of Year	(3,016)	(1,030)	(710)
Allowance for chargebacks
Valuation and qualifying accounts
Balance at Beginning of Year	(13,127)	(13,041)	(7,727)
Additions	(23,214)	(13,399)	(23,369)
Deductions	22,571	13,313	18,055
Balance at End of Year	(13,770)	(13,127)	(13,041)
Allowance for sales returns
Valuation and qualifying accounts
Balance at Beginning of Year	0	0	(20,848)
Deductions	0	0	20,848
Balance at End of Year	$ 0	$ 0	$ 0