XML 91 R65.htm IDEA: XBRL DOCUMENT
v3.25.2

SCHEDULE OF MORTGAGE NOTE PAYABLE (Details) | 12 Months Ended |
--- | --- | ---
Jun. 30, 2025 USD ($) Number | Jun. 30, 2024 USD ($) Number | Jan. 21, 2025
Debt Instrument [Line Items] |  |  |
Annual interest rate on mortgage | 5.40% | 7.60% | 5.00%
Total mortgage notes payable - Hotel | $ 101,519,000 | $ 100,783,000 |
Total mortgage notes payable - real estate | 93,595,000 | 88,173,000 |
Mortgage Notes Payable Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Mortgage notes payable - Hotel | 103,300,000 | 101,462,000 |
Debt issuance costs | (1,781,000) | (679,000) |
Total mortgage notes payable - Hotel | 101,519,000 | 100,783,000 |
Mortgage Notes Payable Real Estate [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt issuance costs | (865,000) | (852,000) |
Mortgage notes payable - real estate | 94,460,000 | 89,025,000 |
Total mortgage notes payable - real estate | $ 93,595,000 | $ 88,173,000 |
Seven Point Six Five Percent Sf Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 544 |  |
Origination Date | March 2025 |  |
Maturity Date | April 2027 |  |
Mortgage notes payable - Hotel | $ 67,000,000 |  |
Annual interest rate on mortgage | 7.65% |  |
Debt instrument, default rate | 4.75% |  |
7.25% SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 544 | 544 |
Origination Date | March 2025 | July 2019 |
Maturity Date | April 2027 | January 2025 |
Mortgage notes payable - Hotel | $ 36,300,000 | $ 24,500,000 |
Annual interest rate on mortgage | 7.25% | 7.25% |
Debt instrument, default rate | 11.25% |  |
Five Poin Four Zero Florence [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 157 |  |
Origination Date | December 2024 |  |
Maturity Date | January 2035 |  |
Annual interest rate on mortgage | 5.40% |  |
Mortgage notes payable - real estate | $ 9,800,000 |  |
2.95% Las Colinas [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 358 | 358 |
Origination Date | October 2021 | October 2021 |
Maturity Date | November 2031 | November 2031 |
Annual interest rate on mortgage | 2.95% | 2.95% |
Mortgage notes payable - real estate | $ 28,800,000 | $ 28,800,000 |
7.60% Las Colinas [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 358 | 358 |
Origination Date | December 2023 | December 2023 |
Maturity Date | November 2031 | November 2031 |
Annual interest rate on mortgage | 7.60% | 7.60% |
Mortgage notes payable - real estate | $ 4,573,000 | $ 4,573,000 |
3.17% Morris County [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 151 | 151 |
Origination Date | April 2020 | April 2020 |
Maturity Date | May 2030 | May 2030 |
Annual interest rate on mortgage | 3.17% | 3.17% |
Mortgage notes payable - real estate | $ 16,392,000 | $ 16,807,000 |
8.60% St. Louis [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 264 | 264 |
Origination Date | May 2023 | May 2013 |
Maturity Date | May 2028 | May 2025 |
Annual interest rate on mortgage | 8.60% | 8.60% |
Mortgage notes payable - real estate | $ 4,950,000 | $ 5,355,000 |
3.50% Los Angeles One [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 4 | 4 |
Origination Date | July 2021 | July 2021 |
Maturity Date | July 2051 | July 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 1,064,000 | $ 1,088,000 |
3.50% Los Angeles Two [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 2 | 2 |
Origination Date | July 2021 | July 2021 |
Maturity Date | July 2051 | July 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 644,000 | $ 659,000 |
3.50% Los Angeles Three [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 1 | 1 |
Origination Date | June 2021 | June 2021 |
Maturity Date | August 2051 | August 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 847,000 | $ 867,000 |
2.52% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 31 | 31 |
Origination Date | October 2020 | October 2020 |
Maturity Date | November 2030 | November 2030 |
Annual interest rate on mortgage | 2.52% | 2.52% |
Mortgage notes payable - real estate | $ 7,907,000 | $ 8,102,000 |
4.40% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 30 | 30 |
Origination Date | June 2022 | June 2022 |
Maturity Date | July 2052 | July 2052 |
Annual interest rate on mortgage | 4.40% | 4.40% |
Mortgage notes payable - real estate | $ 5,558,000 | $ 5,662,000 |
3.05% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 14 | 14 |
Origination Date | January 2021 | January 2021 |
Maturity Date | February 2031 | February 2031 |
Annual interest rate on mortgage | 3.05% | 3.05% |
Mortgage notes payable - real estate | $ 2,522,000 | $ 2,585,000 |
3.59% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 12 | 12 |
Origination Date | June 2016 | June 2016 |
Maturity Date | June 2026 | June 2026 |
Annual interest rate on mortgage | 3.59% | 3.59% |
Mortgage notes payable - real estate | $ 1,863,000 | $ 1,919,000 |
3.09% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 9 | 9 |
Origination Date | June 2020 | June 2020 |
Maturity Date | July 2030 | July 2030 |
Annual interest rate on mortgage | 3.09% | 3.09% |
Mortgage notes payable - real estate | $ 2,326,000 | $ 2,386,000 |
3.05% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 9 | 9 |
Origination Date | November 2020 | November 2020 |
Maturity Date | December 2030 | December 2030 |
Annual interest rate on mortgage | 3.05% | 3.05% |
Mortgage notes payable - real estate | $ 1,803,000 | $ 1,848,000 |
3.50% Los Angeles Four [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 8 | 8 |
Origination Date | July 2021 | July 2021 |
Maturity Date | July 2051 | July 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 1,469,000 | $ 1,503,000 |
3.75% Los Angeles [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 7 | 7 |
Origination Date | August 2012 | August 2012 |
Maturity Date | September 2042 | September 2042 |
Annual interest rate on mortgage | 3.75% | 3.75% |
Mortgage notes payable - real estate | $ 715,000 | $ 733,000 |
3.50% Los Angeles Five [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 4 | 4 |
Origination Date | June 2021 | June 2021 |
Maturity Date | August 2051 | August 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 1,064,000 | $ 1,088,000 |
3.50% Los Angeles Six [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 1 | 1 |
Origination Date | June 2021 | June 2021 |
Maturity Date | August 2051 | August 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 511,000 | $ 523,000 |
3.50% Los Angeles Seven [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 4 | 4 |
Origination Date | July 2021 | July 2021 |
Maturity Date | August 2051 | August 2051 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 766,000 | $ 783,000 |
3.50% Los Angeles Eight [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number | 1 | 1 |
Origination Date | September 2018 | September 2018 |
Maturity Date | October 2048 | October 2048 |
Annual interest rate on mortgage | 3.50% | 3.50% |
Mortgage notes payable - real estate | $ 886,000 | $ 910,000 |
5.28% SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number |  | 544 |
Origination Date |  | December 2013 |
Maturity Date |  | January 2025 |
Mortgage notes payable - Hotel |  | $ 76,962,000 |
Annual interest rate on mortgage |  | 5.28% |
Debt instrument, default rate |  | 4.00% |
3.87% Florence [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Number of Units | Number |  | 157 |
Origination Date |  | March 2015 |
Maturity Date |  | April 2025 |
Annual interest rate on mortgage |  | 3.87% |
Mortgage notes payable - real estate |  | $ 2,834,000 |
Four Point Five Zero Percent SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Annual interest rate on mortgage | 4.50% |  |
Eleven Point Two Five Percent SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Annual interest rate on mortgage | 11.25% |  |
Five Percent SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Annual interest rate on mortgage | 5.00% |  |
Four Percent SF Hotel [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Annual interest rate on mortgage | 4.00% |  |
Debt instrument, default rate | 4.00% |  |

X
- Definition Represents the maturity date. + References No definition available. + Details
Name: | INTG_DebtInstrumentMaturityDateRangeEndTwo
Namespace Prefix: | INTG_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the origination date. + References No definition available. + Details
Name: | INTG_DebtInstrumentMaturityDateRangeStartTwo
Namespace Prefix: | INTG_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mortgage notes payable - Hotel + References No definition available. + Details
Name: | INTG_MortgageNotesPayableHotel
Namespace Prefix: | INTG_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gross amount before deduction of debt issuance cost as of the balance sheet date of mortgage notes payable related to hotel property, plant and equipment. + References No definition available. + Details
Name: | INTG_MortgageNotesPayableHotelGross
Namespace Prefix: | INTG_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Mortgage notes payable real estate. + References No definition available. + Details
Name: | INTG_MortgageNotesPayableRealEstate
Namespace Prefix: | INTG_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Gross amount before deduction of debt issuance cost as of the balance sheet date of mortgage notes payable related to real estate property. + References No definition available. + Details
Name: | INTG_MortgageNotesPayableRealEstateGross
Namespace Prefix: | INTG_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the number of hotel rooms. + References No definition available. + Details
Name: | INTG_NumberOfHotelRooms
Namespace Prefix: | INTG_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The average effective interest rate during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
Name: | us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-8A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 10: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 12: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 26: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 27: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 28: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 29: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 30: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 31: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-1A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=INTG_MortgageNotesPayableHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=INTG_MortgageNotesPayableRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_SevenPointSixFivePercentSfHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_SevenPointTwoFivePercentSFHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FivePoinFourZeroFlorenceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_TwoPointNineFiveLasColinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_SevenPointSixZeroLasColinasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointOneSevenPercentMorrisCountyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_EightPointSixZeroStLouisMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_TwoPointFiveTwoLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FourPointFourZeroLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointZeroFiveLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiftyNineLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointZeroNinePercentLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointZeroFiveLosAngelesOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointSevenFiveLosAngelesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointFiveZeroLosAngelesEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FivePointTwoEightPercentSfHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ThreePointEightSevenFlorenceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FourPointFiveZeroPercentSFHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_ElevenPointTwoFivePercentSFHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FivePercentSFHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=INTG_FourPercentSFHotelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |