S-K 1602(b)(6) Prospectus Summary, Sponsor Compensation	Aug. 31, 2026 USD ($) $ / shares shares
Private Placement Units [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Securities Issued or to be Issued, Shares (in Shares) \| shares	425,000
Price Paid or to be Paid for Securities, Total Amount	$ 4,250,000
Working capital loans [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 1,500,000
Price Paid or to be Paid for Securities, Per Share (in Dollars per share) \| $ / shares	$ 10
Repayment of loans [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 300,000
Office space, utilities and secretarial and administrative support [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Price Paid or to be Paid for Securities, Total Amount	$ 10,000
RainRock Acquisition Management LLC [Member] \| Class B Ordinary Shares [Member]
SPAC Prospectus Summary, Sponsor Compensation [Line Items]
Securities Issued or to be Issued, Shares (in Shares) \| shares	5,462,500
Price Paid or to be Paid for Securities, Total Amount	$ 23,850