Cover - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Apr. 27, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type		10-K/A
Amendment Flag		true
Amendment Description		Amending Part III from 10-K filing
Document Annual Report		true
Document Transition Report	false
Document Period End Date		Dec. 31, 2020
Document Fiscal Period Focus		FY
Document Fiscal Year Focus		2020
Current Fiscal Year End Date		--12-31
Entity File Number		001-14116
Entity Registrant Name		CONSUMER PORTFOLIO SERVICES, INC.
Entity Central Index Key		0000889609
Entity Tax Identification Number		33-0459135
Entity Incorporation, State or Country Code		CA
Entity Address, Address Line One		3800 Howard Hughes Pkwy
Entity Address, City or Town		Las Vegas
Entity Address, State or Province		NV
Entity Address, Postal Zip Code		89169
City Area Code		(949)
Local Phone Number		753-6800
Title of 12(b) Security		Common Stock, no par value
Trading Symbol		CPSS
Security Exchange Name		NASDAQ
Entity Well-known Seasoned Issuer		No
Entity Voluntary Filers		No
Entity Current Reporting Status		Yes
Entity Interactive Data Current		Yes
Entity Filer Category		Accelerated Filer
Entity Small Business		true
Entity Emerging Growth Company		false
Entity Shell Company		false
Entity Public Float				$ 46,542,197
Entity Common Stock, Shares Outstanding			22,653,020
ICFR Auditor Attestation Flag		true