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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2023 USD ($) position | Dec. 31, 2022 USD ($) revenueCategory | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Net Cash Provided by (Used in) Operating Activities |  | $ (135,987) | $ (123,958) | $ (63,598)
Cash and cash equivalents |  | $ 281,279 | $ 498,726 | $ 850,587
Number of revenue category | revenueCategory |  | 3 |  |
2022 Restructuring Plan, Second Phase | Subsequent Event |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Number of planned additional employee termination | position | 500 |  |  |
Expected annualized cost savings | $ 100,000 |  |  |
Internally-developed software |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Intangible assets, useful life |  | 2 years |  |
Minimum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Intangible assets, useful life |  | 1 year |  |
Contract with third party merchants, term |  | 12 months |  |
Minimum | Computer hardware and purchased software |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 3 years |  |
Minimum | Office Equipment |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 3 years |  |
Minimum | Furniture and fixtures and other |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 3 years |  |
Maximum |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Intangible assets, useful life |  | 10 years |  |
Contract with third party merchants, term |  | 18 months |  |
Maximum | Computer hardware and purchased software |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 5 years |  |
Maximum | Office Equipment |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 5 years |  |
Maximum | Furniture and fixtures and other |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Useful life of property and equipment |  | 5 years |  |

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