v3.25.1
Cover
Jun. 13, 2025
Document Information Line Items  
Entity Registrant Name HORIZON SPACE ACQUISITION I CORP.
Entity Central Index Key 0001946021
Document Type 8-K
Amendment Flag false
Entity Emerging Growth Company true
Document Period End Date Jun. 13, 2025
Entity Ex Transition Period false
Entity File Number 001-41578
Entity Incorporation State Country Code E9
Entity Address Address Line 1 1412 Broadway
Entity Address Address Line 2 21st Floor
Entity Address Address Line 3 Suite 21V
Entity Address City Or Town New York
Entity Address State Or Province NY
Entity Address Postal Zip Code 10018
City Area Code 646
Local Phone Number 257-5537
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Unit Consisting Of One Ordinary Shares [Member]  
Document Information Line Items  
Security 12b Title Units, consisting of one Ordinary Share, $0.0001 par value
Trading Symbol HSPOU
Security Exchange Name NASDAQ
Ordinary Shares [Member]  
Document Information Line Items  
Security 12b Title Ordinary Shares, par value $0.0001 per share
Trading Symbol HSPO
Security Exchange Name NASDAQ
Redeemable Warrants [Member]  
Document Information Line Items  
Security 12b Title Redeemable Warrants, each whole warrant exercisable for one Ordinary Share at an exercise price of $11.50
Trading Symbol HSPOW
Security Exchange Name NASDAQ
Rights Each Whole Right To Acquire [Member]  
Document Information Line Items  
Security 12b Title Rights, each whole right to acquire one-tenth of one Ordinary Share
Trading Symbol HSPOR
Security Exchange Name NASDAQ