Loans Held for Investment - Loan Structure (Details)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance	$ 402,687,438	$ 377,388,317
Carrying value	$ 402,969,513	$ 378,612,768
Percent Of Loan Portfolio Holdings	100.00%	100.00%
Allowance for Loan and Lease Losses, Real Estate	$ (1,144,994)	$ 0
Percent Of Allowance Of Loan Losses	(0.003)	0
First Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance	$ 208,956,222	$ 178,130,623
Carrying value	$ 209,289,995	$ 178,203,675
Percent Of Loan Portfolio Holdings	51.90%	47.10%
Equity Securities, Investment Summary
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance	$ 157,686,635	$ 157,144,040
Carrying value	$ 158,285,097	$ 157,737,763
Percent Of Loan Portfolio Holdings	39.30%	41.60%
Mezzanine Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal Balance	$ 36,044,581	$ 42,113,654
Carrying value	$ 36,539,415	$ 42,671,330
Percent Of Loan Portfolio Holdings	9.10%	11.30%

Percent Of Allowance Of Loan Losses

No definition available.

Name:	tpt_PercentOfAllowanceOfLoanLosses
Namespace Prefix:	tpt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percent Of Loan Portfolio Holdings

+ References

No definition available.

+ Details

Name:	tpt_PercentOfLoanPortfolioHoldings
Namespace Prefix:	tpt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of accounts and financing receivable. Includes, but is not limited to, notes and loan receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(5))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 310
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=121581245&loc=d3e21338-158488

+ Details

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

- Definition

This is the result of the principal amount outstanding of total loans managed or securitized less securitized loans and loans that are in the process of being securitized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719

+ Details

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

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_FirstMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_EquitySecuritiesInvestmentSummaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentTypeAxis=tpt_MezzanineLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: