Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentMaturityDateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Identification of each affiliate who is permitted to utilize the line of credit (for example, a subsidiary of the reporting entity) and description of its relationship to the reporting entity.

+ 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
-Subparagraph (SX 210.5-02(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityAffiliatedBorrower
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_TermLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingJanuary2024OpportunityFundingSPEIIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditTrancheAMaturingApril2024OpportunityFundingSPEVLLCOpportunityFundingSPEVIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditTrancheBMaturingJune2025OpportunityFundingSPEVLLCOpportunityFundingSPEVIILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingApril2023OpportunityFundingSPEVILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingFebruary2024OpportunityFundingSPEIVLLCSalaryTapFundingSPELLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingDecember2026OpportunityFundingSPEIXLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=opfi_RevolvingLineOfCreditMaturingApril2025GrayRockSPVLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Borrowings - Schedule of Borrowings (Detail) - USD ($)							1 Months Ended	12 Months Ended
Borrowings - Schedule of Borrowings (Detail) - USD ($)	Dec. 14, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 23, 2021	Mar. 22, 2021	Jan. 31, 2020	Aug. 31, 2019	Dec. 31, 2022	Sep. 30, 2022	Sep. 01, 2022	Aug. 31, 2022	Jun. 14, 2022	Apr. 15, 2022	Apr. 30, 2020	Apr. 30, 2019	Nov. 30, 2018	Jan. 23, 2018
Term Loan
Debt Instrument [Line Items]
Total								$ 51,616,000
Secured borrowing payable
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE II, LLC
Maximum borrowing capacity								$ 756,000
Total			$ 22,443,000					$ 756,000
Interest rate								15.00%
Senior debt
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 482,500,000
Total			251,578,000					344,688,000
Senior debt \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								432,500,000
Total			203,000,000					$ 295,734,000
Senior debt \| Revolving Line Of Credit, Maturing January 2024, Opportunity Funding SPE III, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE III, LLC
Maximum borrowing capacity						$ 175,000,000.0		$ 0									$ 75,000,000.0
Total			119,000,000					$ 0
Maturity Date								January 2024
Senior debt \| Revolving Line Of Credit, Maturing January 2024, Opportunity Funding SPE III, LLC \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate						6.00%		6.00%
Senior debt \| Revolving Line Of Credit, Tranche A, Maturing April 2024, Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC (Tranche A)
Maximum borrowing capacity								$ 75,000,000
Total			45,900,000					$ 37,500,000
Maturity Date								April 2024
Senior debt \| Revolving Line Of Credit, Tranche A, Maturing April 2024, Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate								7.36%
Senior debt \| Revolving Line Of Credit, Tranche B, Maturing June 2025, Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC (Tranche B)
Maximum borrowing capacity								$ 125,000,000				$ 125,000,000
Total			0					$ 121,647,000
Maturity Date								June 2026
Senior debt \| Revolving Line Of Credit, Tranche B, Maturing June 2025, Opportunity Funding SPE V, LLC; Opportunity Funding SPE VII, LLC \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate								6.75%
Senior debt \| Revolving Line Of Credit, Maturing April 2023, Opportunity Funding SPE VI, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE VI, LLC
Maximum borrowing capacity								$ 0							$ 50,000,000.0
Total			30,600,000					$ 0
Maturity Date								April 2023
Senior debt \| Revolving Line Of Credit, Maturing April 2023, Opportunity Funding SPE VI, LLC \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate								7.25%
Senior debt \| Revolving Line Of Credit, Maturing February 2024, Opportunity Funding SPE IV, LLC; SalaryTap Funding SPE, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE IV, LLC; SalaryTap Funding SPE, LLC
Maximum borrowing capacity							$ 25,000,000.0	$ 7,500,000	$ 45,000,000.0	$ 7,500,000	$ 45,000,000
Total			$ 7,500,000					$ 0
Basis spread on variable rate								3.85%
Maturity Date								February 2024
Senior debt \| Revolving Line Of Credit, Maturing February 2024, Opportunity Funding SPE IV, LLC; SalaryTap Funding SPE, LLC \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate			3.85%				4.25%
Senior debt \| Revolving Line Of Credit, Maturing February 2024, Opportunity Funding SPE IV, LLC; SalaryTap Funding SPE, LLC \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.11%						0.11%
Senior debt \| Revolving Line Of Credit, Maturing December 2026, Opportunity Funding SPE IV, LLC
Debt Instrument [Line Items]
Borrower								Opportunity Funding SPE IX, LLC
Maximum borrowing capacity	$ 150,000,000							$ 150,000,000
Total			$ 0					$ 91,871,000
Maturity Date								December 2026
Senior debt \| Revolving Line Of Credit, Maturing December 2026, Opportunity Funding SPE IV, LLC \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	7.50%							7.50%
Senior debt \| Revolving Line Of Credit, Maturing April 2025, Gray Rock SPV LLC
Debt Instrument [Line Items]
Borrower								Gray Rock SPV LLC
Maximum borrowing capacity								$ 75,000,000					$ 75,000,000
Total			0					$ 44,716,000
Maturity Date								April 2025
Senior debt \| Revolving Line Of Credit, Maturing April 2025, Gray Rock SPV LLC \| Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate								7.25%
Senior debt \| Term Loan
Debt Instrument [Line Items]
Borrower								OppFi-LLC
Maximum borrowing capacity								$ 50,000,000						$ 50,000,000.0		$ 25,000,000.0
Total			48,578,000					$ 48,954,000
Maturity Date								March 2025
Senior debt \| Term Loan \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate				10.00%	14.00%			10.00%
Note payable
Debt Instrument [Line Items]
Borrower								OppFi-LLC
Maximum borrowing capacity								$ 1,616,000
Total			$ 0					$ 1,616,000
Interest rate								7.07%
Maturity Date								July 2023