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Commitments & Contingencies (Details) - USD ($)		6 Months Ended
	Mar. 28, 2023	Jun. 30, 2025	Dec. 31, 2024
Commitments & Contingencies [Line Items]
Underwriters option period from the date of initial public offering		45 days
Gross proceeds	$ 57,500,000
Deferred underwriting fee		3.50%
Cash fee		$ 100,000
Share issued, percentage		5.00%
Accrued consulting service expenses		$ 2,100,000	$ 1,500,000
Over-Allotment Option [Member]
Commitments & Contingencies [Line Items]
Number of units issued (in Shares)	750,000	750,000
Over-Allotment Option [Member] | Benchmark Investments, LLC [Member]
Commitments & Contingencies [Line Items]
Number of units issued (in Shares)	750,000
IPO [Member]
Commitments & Contingencies [Line Items]
Number of units issued (in Shares)	5,750,000
Gross proceeds	$ 57,500,000
Percentage of deferred underwriting fee		2.00%
Gross proceeds		$ 2,012,500
IPO [Member] | Benchmark Investments, LLC [Member]
Commitments & Contingencies [Line Items]
Gross proceeds	$ 7,500,000	$ 1,150,000

X

- Definition

The Value of cash fee.

+ References

No definition available.

+ Details

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Namespace Prefix:	oaku_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The percentage of deferred underwriting discount percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	oaku_
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Balance Type:	na
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X

- Definition

The percentage of deferred underwriting fee.

+ References

No definition available.

+ Details

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Namespace Prefix:	oaku_
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Balance Type:	na
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X

- Definition

Proceeds from deferred underwriting fee.

+ References

No definition available.

+ Details

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X

- Definition

Share issued, percentage.

+ References

No definition available.

+ Details

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X

- Definition

Represents the underwriters option period from the date of initial public offering.

+ References

No definition available.

+ Details

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Namespace Prefix:	oaku_
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X

- Definition

Number of new units issued during the period.

+ References

No definition available.

+ Details

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X

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(20))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

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