XML 88 R49.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Schedule of Amortized Cost Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans | $ 680,071 | $ 483,378
Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans | 677,837 | 482,141
Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans |  |
Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans | 2,234 | 1,237
Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans |  |
Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Subtotal loans |  |
Construction Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 11,869 |
2022 | 14,933 |
2021 | 2,689 |
2020 | 1,488 |
2019 | 1,621 |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 32,600 | 17,286
Construction Loans [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 11,869 |
2022 | 14,933 |
2021 | 2,689 |
2020 | 1,488 |
2019 | 1,621 |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 32,600 | 17,286
Construction Loans [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Construction Loans [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Construction Loans [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Construction Loans [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Real Estate Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 123,081 |
2022 | 204,425 |
2021 | 52,536 |
2020 | 15,297 |
2019 | 13,802 |
Prior | 13,539 |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 422,680 | 310,695
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Current period Gross write-offs |  |
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 123,081 |
2022 | 204,425 |
2021 | 52,536 |
2020 | 15,297 |
2019 | 12,593 |
Prior | 13,539 |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 421,471 | 309,458
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 | 1,209 |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 1,209 | 1,237
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Real Estate Portfolio Segment [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Residential Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 21,343 |
2022 | 25,898 |
2021 | 9,747 |
2020 | 4,777 |
2019 | 4,044 |
Prior | 4,844 |
Revolving Loans (Amortized Cost Basis) | 747 |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 71,400 | 50,354
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Current period Gross write-offs |  |
Residential Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 21,343 |
2022 | 25,898 |
2021 | 9,747 |
2020 | 4,777 |
2019 | 4,044 |
Prior | 4,844 |
Revolving Loans (Amortized Cost Basis) | 747 |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 71,400 | 50,354
Residential Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Residential Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Residential Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Residential Portfolio Segment [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Multi Family Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 1,369 |
2022 | 29,561 |
2021 | 27,224 |
2020 | 6,086 |
2019 | 2,064 |
Prior | 1,194 |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 67,498 | 69,555
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Current period Gross write-offs |  |
Multi Family Real Estate [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 1,369 |
2022 | 29,561 |
2021 | 27,224 |
2020 | 6,086 |
2019 | 2,064 |
Prior | 1,194 |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 67,498 | 69,555
Multi Family Real Estate [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Multi Family Real Estate [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Multi Family Real Estate [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Multi Family Real Estate [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 37,854 |
2022 | 1,935 |
2021 | 1,403 |
2020 | 634 |
2019 | 44 |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 41,870 | 5,165
2023 | (45) |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior | (26) |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Current period Gross write-offs | (71) |
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 37,854 |
2022 | 1,935 |
2021 | 1,403 |
2020 | 634 |
2019 | 44 |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 41,870 | 5,165
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Commercial Portfolio Segment [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 8,657 |
2022 | 7,033 |
2021 | 3,627 |
2020 | 147 |
2019 | 111 |
Prior |  |
Revolving Loans (Amortized Cost Basis) | 24,448 |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 44,023 | 30,323
2023 | (423) |
2022 | (1,065) |
2021 | (880) |
2020 | (3) |
2019 |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Current period Gross write-offs | (2,371) |
Consumer Portfolio Segment [Member] | Pass [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 | 8,657 |
2022 | 7,033 |
2021 | 3,627 |
2020 | 147 |
2019 | 111 |
Prior |  |
Revolving Loans (Amortized Cost Basis) | 23,423 |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 42,998 | 30,323
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Consumer Portfolio Segment [Member] | Substandard [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) | 1,025 |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans | 1,025 |
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |
Consumer Portfolio Segment [Member] | Loss [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
2023 |  |
2022 |  |
2021 |  |
2020 |  |
2019 |  |
Prior |  |
Revolving Loans (Amortized Cost Basis) |  |
Revolving Loans Converted to Term Loans (Amortized Cost Basis) |  |
Subtotal loans |  |

X
- Definition Loans and leases receivable converted term loans amortized cost basis. + References No definition available. + Details
Name: | OPHC_LoansAndLeasesReceivableConvertedTermLoansAmortizedCostBasis
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans and leases receivable loans amortized cost basis. + References No definition available. + Details
Name: | OPHC_LoansAndLeasesReceivableLoansAmortizedCostBasis
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGross
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross carrying amount. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossCarryingAmount
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross converted term loans amortized cost basis. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossConvertedTermLoansAmortizedCostBasis
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross prior year. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossPriorYear
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross year five. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossYearFive
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross year four. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossYearFour
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross year one. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossYearOne
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross year three. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossYearThree
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loans chargeoffs gross year two. + References No definition available. + Details
Name: | OPHC_LoansChargeoffsGrossYearTwo
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination prior year. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationPriorYear
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination year five. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationYearFive
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination year four. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationYearFour
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination year one. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationYearOne
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination year three. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationYearThree
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term loans amortized cost basis by origination year two. + References No definition available. + Details
Name: | OPHC_TermLoansAmortizedCostBasisByOriginationYearTwo
Namespace Prefix: | OPHC_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Name Regulation S-K (SK) -Number 229 -Section 1404 -Paragraph (a) -Publisher SEC Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7A -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=OPHC_LossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=OPHC_MultiFamilyRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |