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GOODWILL AND INTANGIBLE ASSETS (AS RESTATED) - Intangible Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Goodwill and Intangible Assets Disclosure [Abstract] |  |
Gross Carrying Value | $ 20,000 | $ 20,000
Accumulated Amortization | 5,417 | 3,917
Net Carrying Value | $ 14,583 | $ 16,083

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- Definition Intangible Liabilities, Accumulated Amortization + References No definition available. + Details
Name: | up_IntangibleLiabilitiesAccumulatedAmortization
Namespace Prefix: | up_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Intangible Liabilities, Gross + References No definition available. + Details
Name: | up_IntangibleLiabilitiesGross
Namespace Prefix: | up_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Intangible Liabilities, Net + References No definition available. + Details
Name: | up_IntangibleLiabilitiesNet
Namespace Prefix: | up_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration