XML 12 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2021
Aug. 16, 2021
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q2  
Entity Registrant Name DMY TECHNOLOGY GROUP, INC. IV  
Entity Central Index Key 0001836833  
Current Fiscal Year End Date --12-31  
Document Quarterly Report true  
Document Transition Report false  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-40166  
Entity Tax Identification Number 85-2992192  
Entity Address, Address Line One 1180 North Town Center Drive  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Las Vegas  
Entity Address, State or Province NV  
Entity Address, Postal Zip Code 89144  
City Area Code 702  
Local Phone Number 781-4313  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company true  
Entity Ex Transition Period false  
Capital Units [Member]    
Entity Information [Line Items]    
Trading Symbol DMYQ.U  
Title of 12(b) Security Units, each consisting of one share of Class Acommon stock and one-fifth of one redeemable warrant  
Security Exchange Name NYSE  
Common Class A [Member]    
Entity Information [Line Items]    
Trading Symbol DMYQ  
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   34,500,000
Warrant [Member]    
Entity Information [Line Items]    
Trading Symbol DMYQ WS  
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of Class A common stock, each at an exercise price of $11.50 per share  
Security Exchange Name NYSE  
Common Class B [Member]    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   8,625,000