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Private Placement (Details) - Private Placement [Member] - USD ($)		6 Months Ended
	Mar. 28, 2023	Jun. 30, 2025
Private Placement [Line Items]
Number of units		343,125
Price per private units	$ 10.175	$ 10
Purchase price	$ 3,431,250	$ 3,431,250

X

- Definition

Number of new units issued during the period.

+ References

No definition available.

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Namespace Prefix:	oaku_
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Balance Type:	na
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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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ 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

+ Details

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Balance Type:	debit
Period Type:	duration

X

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: