v3.26.3
Cover
Sep. 25, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 25, 2026
Current Fiscal Year End Date --12-31
Entity File Number 001-41825
Entity Registrant Name SPARK I ACQUISITION CORPORATION
Entity Central Index Key 0001884046
Entity Tax Identification Number 87-1738866
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 3790 El Camino Real
Entity Address, Address Line Two Unit #570
Entity Address, City or Town Palo Alto
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94306
City Area Code 650
Local Phone Number 353-7082
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant [Member]  
Document Information [Line Items]  
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant
Trading Symbol SPKLU
Security Exchange Name NASDAQ
Common Class A [Member]  
Document Information [Line Items]  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 par value
Trading Symbol SPKL
Security Exchange Name NASDAQ
Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share [Member]  
Document Information [Line Items]  
Title of 12(b) Security Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share
Trading Symbol SPKLW
Security Exchange Name NASDAQ