Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
12 Months Ended
Dec. 31, 2022
Mar. 09, 2023
Jun. 30, 2022
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Annual Report true    
Document Transition Report false    
Document Fiscal Year Focus 2022    
Document Period End Date Dec. 31, 2022    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Registrant Name BLACK SPADE ACQUISITION CO    
Entity Central Index Key 0001851908    
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    
Entity Ex Transition Period false    
Entity Shell Company true    
Entity File Number 001-40616    
Entity Incorporation, State or Country Code E9    
Entity Address, Address Line One Suite 2902, 29/F, The Centrium    
Entity Address, Address Line Two 60 Wyndham Street    
Entity Address, City or Town Central    
City Area Code 852    
Local Phone Number 3955 1316    
Entity Tax Identification Number 00-0000000    
Entity Address, Postal Zip Code 0000    
Entity Address, Country HK    
Entity Public Float     $ 163,761,000
ICFR Auditor Attestation Flag false    
Auditor Name Marcum Asia CPAs LLP    
Auditor Firm ID 5395    
Auditor Location New York    
Common Class A [Member]      
Document Information [Line Items]      
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share    
Trading Symbol BSAQ    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   16,900,000  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   4,225,000  
Units [Member]      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one half redeemable warrant    
Trading Symbol BSAQU    
Security Exchange Name NYSE    
Redeemable Warrants [Member]      
Document Information [Line Items]      
Title of 12(b) Security Redeemable warrants, each warrant exercisable for one Class A ordinary share at an exercise price of $11.50    
Trading Symbol BSAQWS    
Security Exchange Name NYSE