Debt Instrument Interest Rate Measurement Period

No definition available.

Name:	mnpt_DebtInstrumentInterestRateMeasurementPeriod
Namespace Prefix:	mnpt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The minimum percent of collateral security required of outstanding loan balance.

+ References

No definition available.

+ Details

Name:	mnpt_MinimumCollateralizationRatio
Namespace Prefix:	mnpt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the maximum amount of a new class of notes authorized registered with U.S. Securities and Exchange Commission by the entity.

+ References

No definition available.

+ Details

Name:	mnpt_NotesAuthorizedMaximum
Namespace Prefix:	mnpt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number Of Series In Class Of Notes

+ References

No definition available.

+ Details

Name:	mnpt_NumberOfSeriesInClassOfNotes
Namespace Prefix:	mnpt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of assets pledged to secure a debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ 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 210.5-02.17)
-URI http://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 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentAxis=mnpt_ClassANotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnpt_Class1NotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnpt_Class1aNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnpt_SecuredInvestmentCertificatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CashMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mnpt_SpecialSubordinatedNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

Investor Notes Payable (Narrative) (Details)	9 Months Ended
Investor Notes Payable (Narrative) (Details)	Sep. 30, 2020 USD ($) item	Dec. 31, 2019 USD ($)	Apr. 30, 2018 USD ($)	Feb. 28, 2018 USD ($)	Jan. 31, 2015 USD ($)
Debt Instrument [Line Items]
Debt issuance costs	$ 25,000	$ 55,000
Class A [Member]
Debt Instrument [Line Items]
Number of series in class of notes \| item	3
Class 1 [Member]
Debt Instrument [Line Items]
Number of series in class of notes \| item	2
Class 1A [Member]
Debt Instrument [Line Items]
Number of series in class of notes \| item	2
Notes authorized, maximum				$ 90,000,000
Secured Notes [Member]
Debt Instrument [Line Items]
Notes authorized, maximum			$ 80,000,000		$ 80,000,000
Secured Notes [Member] \| Cash [Member]
Debt Instrument [Line Items]
Minimum collateralization ratio	100.00%
Collateral pledged	$ 0	0
Secured Notes [Member] \| Loans Receivable [Member]
Debt Instrument [Line Items]
Minimum collateralization ratio	105.00%
Subordinated Notes [Member] \| Loans Receivable [Member]
Debt Instrument [Line Items]
Collateral pledged	$ 9,127,000	$ 13,019,000
Subordinated Notes [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Maturity period	12 months
Subordinated Notes [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Maturity period	60 months
Subordinated Notes [Member] \| Swap Index Rate [Member]
Debt Instrument [Line Items]
Interest rate measurement period	7 days