Subsequent Events (Details) - Subsequent Event $ in Millions	Nov. 02, 2021 USD ($) item
Short Term First Priority Lien Secured Revolving Facility [Member]
Subsequent Events
Line of Credit Facility, Maximum Borrowing Capacity	$ 100.0
Calculus Lending Facility [Member]
Subsequent Events
Letters of Credit Outstanding, Amount	4.4
Line of Credit Facility, Maximum Borrowing Capacity	$ 50.0
Commitment fee percentage for unused Portion	3.00%
Number of trailing quarters \| item	4
Total proved PV -10 to debt ratio	2.00
Credit Agreement, Leverage Ratio	2.50
Credit Agreement, Minimum Current Ratio	1.00
Percentage of funding or utilization of the credit facility	100.00%
Calculus Lending Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Subsequent Events
Debt Instrument, Basis Spread on Variable Rate	6.00%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Definition

The leverage ratio for the associated credit agreement.

+ References

No definition available.

+ Details

Name:	wti_CreditAgreementLeverageRatio
Namespace Prefix:	wti_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum ratio of current assets to current liabilities that must be maintained under the credit agreement.

+ References

No definition available.

+ Details

Name:	wti_CreditAgreementMinimumCurrentRatio
Namespace Prefix:	wti_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The total proved PV -10 to debt ratio under the debt instrument covenant.

+ References

No definition available.

+ Details

Name:	wti_DebtInstrumentTotalProvedPV10ToDebtRatio
Namespace Prefix:	wti_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of funding or utilization of the credit facility under the agreement.

+ References

No definition available.

+ Details

Name:	wti_LineOfCreditFacilityArrangementPercentageOfFundingOrUtilization
Namespace Prefix:	wti_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of trailing quarters under the line of credit facility arrangement.

+ References

No definition available.

+ Details

Name:	wti_LineOfCreditFacilityNumberOfTrailingQuarters
Namespace Prefix:	wti_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=wti_ShortTermFirstPriorityLienSecuredRevolvingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=wti_CalculusCapitalLendingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: