Revolving Credit Agreements (Details)	Mar. 17, 2021 USD ($) ft² building	Mar. 31, 2021 USD ($)
International Drive Buildings [Member]
Revolving credit agreement
Number of buildings used as collateral \| building	2
Area of collateralized properties (in square feet) \| ft²	283,000
Office Or Flex Buildings [Member]
Revolving credit agreement
Number of buildings used as collateral \| building	2
Area of collateralized properties (in square feet) \| ft²	224,000
Sunport Building [Member]
Revolving credit agreement
Number of buildings used as collateral \| building	2
Area of collateralized properties (in square feet) \| ft²	50,000
Webster Credit Line
Revolving credit agreement
Maximum borrowing capacity	$ 19,500,000
Increased line of credit	$ 35,000,000
Maximum percentage of loan to value	70.00%
Minimum liquidity	$ 5,000,000
Fixed charge coverage ratio	1.1
Standby letters of credit aggregate amount		$ 125,000
Outstanding borrowings under credit line		0
Webster Credit Line \| LIBOR
Revolving credit agreement
Variable interest rate margin (as a percent)	2.50%
Acquisition Credit Line
Revolving credit agreement
Maximum borrowing capacity	$ 15,000
Minimum liquidity	$ 5,000,000
Fixed charge coverage ratio	1.1
Purchase price of real estate acquisitions (as a percent)	65.00%
Maximum period for obtaining permanent finance from date of drawn	135 days
Minimum debt service coverage ratio	1.25
Minimum net worth	$ 80,000,000
Percentage of fair market value of assets	50.00%
Outstanding borrowings under credit line		$ 0
Acquisition Credit Line \| LIBOR
Revolving credit agreement
Variable interest rate margin (as a percent)	2.75%

Area of real estate that have been pledged as collateral for borrowings.

No definition available.

Name:	indt_AreaOfRealEstatePledgedAsCollateral
Namespace Prefix:	indt_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The aggregate borrowing capacity under the credit facility, consisting of the maximum borrowing capacity plus the contingent increase, if any one or more of the existing banks or new banks agree to provide such increased commitment amount.

+ References

No definition available.

+ Details

Name:	indt_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity
Namespace Prefix:	indt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fixed charge coverage ratio for line of credit facility.

+ References

No definition available.

+ Details

Name:	indt_LineOfCreditFacilityFixedCoverageRatio
Namespace Prefix:	indt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum liquidity requirement to be maintained under line of credit facility.

+ References

No definition available.

+ Details

Name:	indt_LineOfCreditFacilityMinimumLiquidityRequired
Namespace Prefix:	indt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Maximum percentage of loan to value.

+ References

No definition available.

+ Details

Name:	indt_MaximumPercentageOfLoanToValue
Namespace Prefix:	indt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The maximum period with in which the entity has to get performance financing from the date of withdrawn from acquisition credit line.

+ References

No definition available.

+ Details

Name:	indt_MaximumPeriodForObtainingPermanentFinancingFromDrawnOfFundsFromAcquisitionCreditLine
Namespace Prefix:	indt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum debt service coverage ratio.

+ References

No definition available.

+ Details

Name:	indt_MinimumDebtServiceCoverageRatio
Namespace Prefix:	indt_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of buildings, such as office or industrial/warehouse, used as collateral for a debt instrument.

+ References

No definition available.

+ Details

Name:	indt_NumberOfBuildingsUsedAsCollateral
Namespace Prefix:	indt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of fair market value of assets of the reporting entity.

+ References

No definition available.

+ Details

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Namespace Prefix:	indt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of purchase price of real estate acquisitions.

+ References

No definition available.

+ Details

Name:	indt_PercentageOfPurchasePriceOfRealEstateAcquisitions
Namespace Prefix:	indt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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 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 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

+ Details

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

- 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

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

- Definition

The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(a)
-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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- Details

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