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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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