Entity Ex Transition Period Entity Filer Category Entity Incorporation, State or Country Code Entity Registrant Name Entity Small Business Less: Amounts paid for redemptions [Member] Less: Deferred underwriting commissions [Member] Less: Ordinary shares redeemed [Member] Less: Overallotment liability [Member] Net proceeds from this offering and the sale of the placement shares [Member] Net tangible book deficit before this offering [Member] Ordinary shares forfeited if over-allotment is not exercised [Member] Ordinary shares offered and sale of placement shares [Member] Ordinary shares outstanding prior to this offering [Member] SPAC Offering Forepart, Security Holders Have the Opportunity to Redeem Securities [Flag] SPAC Offering Forepart, Sponsor Compensation Material Dilution [Flag] SPAC, Securities Offered, Redemption Rights [Text Block] De-SPAC Consummation Timeframe Extension, Security Holders Voting or Redemption Rights [Flag] SPAC Offering Forepart [Line Items] Redemption at 100 Percent of Maximum [Member] No Redemption [Member] All Redemption Levels [Member] All Security Classes [Member] All Dilution Sources [Member] Dilution Source [Axis] Redemption Level [Axis] Net Tangible Book Value, Adjusted, per Share Net Tangible Book Value, Increase from Public Shareholders, Per Share Net Tangible Book Value, Pre-transaction, Per Share De-SPAC, Material Potential Source of Future Dilution, Description [Text Block] SPAC, Compensation and Securities Issuance, Material Dilution, Likelihood [Text Block] SPAC Offering Forepart, Adjusted Net Tangible Book Value Per Share [Table Text Block] SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Table Text Block] SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Abstract] Redemption at 75 Percent of Maximum [Member] Representative Shares [Member] Security Class [Axis] SPAC, Adjusted Net Tangible Book Value Per Share with Sources of Dilution [Table] De-SPAC Consummation Timeframe, How Extended [Text Block] SPAC, Actual or Potential Material Conflict of Interest, Prospectus Summary [Text Block] Number of Shares Used [Line Items] Registered Offering Price per Share Private Placement shares [Member] SPAC Prospectus Summary, Sponsor Compensation [Table Text Block] Plus: Offering costs accrued for or paid in advance, excluded from tangible book value [Member] Redemption at 50 Percent of Maximum [Member] Redemption at 25 Percent of Maximum [Member] With Over- Allotment [Member] Without Over- Allotment [Member] Number of Shares Used to Determine Net Tangible Book Value per Share, Adjusted Number of Shares Used to Determine Net Tangible Book Value per Share, Pre-transaction Net Tangible Book Value, Adjusted Net Tangible Book Value, Proceeds from Offering Net Tangible Book Value Net Tangible Book Value, Amount of Dilution, per Share SPAC Sponsor Controlling Person [Line Items] SPAC Sponsor Controlling Person Name SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block] SPAC Sponsor, Description of Exceptions to Restrictions [Text Block] SPAC Sponsor, Persons and Entities Subject to Restrictions SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items] SPAC Sponsor, its Affiliates and Promoters [Line Items] SPAC Sponsor and Conflicts of Interest [Line Items] Fiduciary Duties to Other Companies, SPAC Officers and Directors [Table Text Block] Fiduciary Duties to Other Companies, SPAC Officers and Directors [Abstract] Fiduciary Duties to Other Companies, SPAC Officers and Directors [Line Items] SPAC Officers and Directors, Fiduciary Duties to Other Companies, Description [Text Block] Amendment Description Amendment Flag Document And Entity Information Abstract Document Information [Line Items] Document Information [Table] Document Type Entity Central Index Key Entity Emerging Growth Company spac [Table] Conflict of Interest, Party [Axis] All Conflict of Interest Parties [Member] spac [Line Items] Conflict of Interest, Description [Text Block] SPAC Officers and Directors [Member] Initial Shareholders [Member] Our Sponsor [Member] SPAC, Trust or Escrow Account, Material Terms [Text Block] Loan [Member] Private Placement Units [Member] Class B Ordinary Shares [Member] Office space, administrative and shared personnel support services [Member] SPAC Sponsor, Affiliate, or Promoter [Axis] SPAC Prospectus Summary, Sponsor Compensation [Table] SPAC Prospectus Summary, Sponsor Compensation [Abstract] SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Abstract] Difference Between the Offering Price and the Adjusted Net Tangible Book Value, Per Share SPAC Forepart, Adjusted Net Tangible Book Value Per Share [Line Items] Over-allotment Option Exercised [Member] Over-allotment Option Not Exercised [Member] All Over-allotment Options [Member] Price Paid or to be Paid for Securities, Per Share Price Paid or to be Paid for Securities, Total Amount SPAC Sponsor [Abstract] Working capital loans [Member] SPAC Sponsor [Line Items] SPAC Sponsor Name SPAC Sponsor Form of Organization SPAC Sponsor Business, General Character [Text Block] SPAC Sponsor Controlling Persons [Abstract] SPAC, Trust or Escrow Account, Gross Offering Proceeds Placed, Percent SPAC, Trust or Escrow Account, Gross Offering Proceeds Placed, Amount SPAC Offering Forepart, Adjusted Net Tangible Book Value Per Share [Table] Over-allotment Option [Axis] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Table Text Block] SPAC Prospectus Summary, Sponsor Compensation [Line Items] All SPAC Sponsors, Affiliates, or Promoters [Member] Compensation Nature [Axis] All Compensation Natures [Member] Harbour Island Acquisition Sponsor LLC [Member] Securities Issued or to be Issued, Shares Other Units and Convertible Securities [Member] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Table] Founder Shares [Member] SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Abstract]