Class of warrants and rights issued during the period.

No definition available.

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Namespace Prefix:	rangu_
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Balance Type:	na
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- 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_
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Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

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Namespace Prefix:
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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Period Type:

Private Placement - Additional Information (Details) - USD ($)				3 Months Ended
	Sep. 30, 2025	Dec. 31, 2024	Dec. 23, 2024	Mar. 31, 2026	Mar. 31, 2025	Jan. 03, 2025
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued in transaction					37,500
Proceeds from issuance of private placement				$ 0	$ 375,000
IPO [Member]
Class of Warrant or Right [Line Items]
Sale of stock, price per share						$ 10.05
Private Placement [Member]
Class of Warrant or Right [Line Items]
Class of warrant or right, number of securities called by each warrant or right				1
Sale of stock, number of shares issued in transaction		37,500
Sale of stock, price per share				$ 10
Proceeds from issuance of private placement	$ 375,000
Private Placement [Member] \| IPO [Member]
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued in transaction			400,000
Sale of stock, price per share			$ 10
Proceeds from issuance of private placement			$ 4,000,000
Private Placement [Member] \| IPO [Member] \| Sponsor [Member]
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued in transaction				300,000
Private Placement [Member] \| IPO [Member] \| EBC [Member]
Class of Warrant or Right [Line Items]
Class of warrants and rights issued during the period			100,000