v3.25.4
Cover - USD ($)
12 Months Ended
Dec. 31, 2025
Feb. 19, 2026
Jun. 30, 2025
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Current Fiscal Year End Date --12-31    
Entity File Number 001-42400    
Entity Registrant Name Willow Lane Acquisition Corp.    
Entity Central Index Key 0002032379    
Entity Tax Identification Number 00-0000000    
Entity Incorporation, State or Country Code E9    
Entity Address, Address Line One 250 West 57th Street    
Entity Address, Address Line Two Suite 415    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10107    
City Area Code (646)    
Local Phone Number 565-3861    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company true    
Elected Not To Use the Extended Transition Period false    
Entity Shell Company true    
Entity Public Float     $ 129,409,500
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Auditor Opinion [Text Block] We have audited the accompanying balance sheets of Willow Lane Acquisition Corp. as of December 31, 2025 and 2024, and the related statements of operations, changes in shareholders’ deficit, and cash flows for the year ended December 31, 2025 and the period from July 3, 2024 (Inception) through December 31, 2024, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of Willow Lane Acquisition Corp. as of December 31, 2025 and 2024, and the results of its operations and its cash flows for the year then ended and the period from July 3, 2024 (Inception) through December 31, 2024, in conformity with accounting principles generally accepted in the United States of America.    
Auditor Name WithumSmith+Brown, PC    
Auditor Location New York, New York    
Auditor Firm ID 100    
Units, each consisting of one Class A Ordinary Share and one-half of one Redeemable Warrant      
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share and one-half of one Redeemable Warrant    
Trading Symbol WLACU    
Security Exchange Name NASDAQ    
Class A Ordinary Shares, par value $0.0001 per share      
Title of 12(b) Security Class A Ordinary Shares, par value $0.0001 per share    
Trading Symbol WLAC    
Security Exchange Name NASDAQ    
Redeemable Warrants, each whole warrant exercisable for one      
Title of 12(b) Security Redeemable Warrants, each whole warrant exercisable for one Class A Ordinary Share at an exercise price of $11.50    
Trading Symbol WLACW    
Security Exchange Name NASDAQ    
Common Class A [Member]      
Entity Common Stock, Shares Outstanding   12,650,000  
Entity Listing, Par Value Per Share $ 0.0001    
Common Class B [Member]      
Entity Common Stock, Shares Outstanding   4,628,674  
Entity Listing, Par Value Per Share $ 0.0001