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Cover - shares
 3 Months Ended
Mar. 31, 2020
Sep. 30, 2020
Cover [Abstract]    
Entity Registrant Name CPI AEROSTRUCTURES INC  
Entity Central Index Key 0000889348  
Document Type 10-Q  
Amendment Flag false  
Entity File Number 1-11398  
Entity Incorporation, State or Country Code NY  
Document Period End Date Mar. 31, 2020  
Current Fiscal Year End Date --12-31  
Entity Reporting Status Current No  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   11,926,177
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2020