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DEBT - Convertible Notes (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Mar. 25, 2020	Dec. 30, 2020
Debt Instrument [Line Items]
Amortization of debt issuance costs		$ 86	$ 0
0% Convertible Senior Notes
Debt Instrument [Line Items]
Issuance of Class A common stock sold in equity offerings, net of underwriting discounts, commissions and offering costs	$ 225,000
0% Convertible Senior Notes | Private Placement
Debt Instrument [Line Items]
Issuance of Class A common stock sold in equity offerings, net of underwriting discounts, commissions and offering costs	$ 250,000
Conversion rate	5,867.9000
Conversion of stock, price per share	$ 170,420
Stock Issued During Period, Value, Net Of Debt Issuance Costs	$ 242,875
Debt issuance costs	7,125
Amortization of debt issuance costs	86
Payment of Financing and Stock Issuance Costs	236
0% Convertible Senior Notes | Private Placement | Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Equity, Fair Value Disclosure	248,125	$ 248,125
0% Convertible Senior Notes | Over-Allotment Option
Debt Instrument [Line Items]
Issuance of Class A common stock sold in equity offerings, net of underwriting discounts, commissions and offering costs	$ 25,000
Class A Common Stock
Debt Instrument [Line Items]
Common stock par value (in dollars per share)	$ 0.001	$ 0.001		$ 0.001

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