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Fair Value Measurements (Details)	9 Months Ended
	Sep. 30, 2023
Fair Value Measurements [Abstract]
Liquid investments, original maturities	90 days

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- References

No definition available.

+ Details

Name:	us-gaap_FairValueMeasurementsNonrecurringValueMeasurementAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Cash equivalents maturity period.

+ References

No definition available.

+ Details

Name:	wt_CashEquivalentsMaturityPeriod
Namespace Prefix:	wt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration