(6) Debt (Details - Debt outstanding) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Warehouse lines of credit	$ 118,999	$ 134,791
Residual interest financing	25,426	39,478
Subordinated renewable notes	21,323	17,534
Total debt outstanding	$ 167,411	194,317
Warehouse lines of credit [Member]
Line of Credit Facility [Line Items]
Interest rate	5.50% over one month Libor (Minimum 6.50%)
Maturity date description	February 2021
Warehouse lines of credit	$ 42,558	40,558
Warehouse lines of credit (2) [Member]
Line of Credit Facility [Line Items]
Interest rate	3.00% over one month Libor (Minimum 3.75%)
Maturity date description	December 2022
Warehouse lines of credit	$ 45,689	96,225
Warehouse lines of credit (3) [Member]
Line of Credit Facility [Line Items]
Interest rate	4.00% over a commercial paper rate (Minimum 5.00%)
Maturity date description	December 2021
Warehouse lines of credit	$ 32,265	0
Residual interest financing [Member]
Line of Credit Facility [Line Items]
Maturity date description	January 2026
Interest rate	8.60%
Residual interest financing	$ 25,576	40,000
Subordinated renewable notes [Member]
Line of Credit Facility [Line Items]
Interest rate	Weighted average rate of 10.09% and 9.75% at December 31, 2020 and December 31, 2019, respectively
Maturity date description	Weighted average maturity of January 2023 and April 2022 at December 31, 2020 and December 31, 2019, respectively
Subordinated renewable notes	$ 21,323	$ 17,534

Residual Interest Financing

No definition available.

Name:	cpss_ResidualInterestFinancing
Namespace Prefix:	cpss_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Period Type:	duration

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

+ Details

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- Definition

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of the outstanding short-term borrowings under a revolving line of credit used by mortgage bankers to finance the origination or purchase of loans.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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