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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Gross Carrying Value	$ 20,000	$ 20,000
Accumulated Amortization	8,561	7,798
Net Carrying Value	$ 11,439	$ 12,202

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- Definition

Intangible Liabilities, Accumulated Amortization

+ References

No definition available.

+ Details

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Namespace Prefix:	up_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

X

- 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

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Namespace Prefix:	us-gaap_
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