v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 06, 2019
Cover [Abstract]    
Entity Registrant Name CONSUMER PORTFOLIO SERVICES INC  
Entity Central Index Key 0000889609  
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity File Number 1-14116  
Entity's Reporting Status Current Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business true  
Entity Shell Company false  
Entity Incorporation, State or Country Code CA  
Entity Common Stock, Shares Outstanding   22,530,918
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2019