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REAL ESTATE INVESTMENTS, NET - Narrative (Details) |  |  |  |  |  |  |  |  |  |  | 3 Months Ended | 4 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 20, 2021 USD ($) | Jul. 07, 2021 USD ($) | Feb. 12, 2021 USD ($) | Jan. 29, 2021 USD ($) | Jan. 07, 2021 USD ($) | Dec. 31, 2020 USD ($) lease property | Sep. 16, 2020 USD ($) | Aug. 27, 2020 USD ($) | Aug. 03, 2020 USD ($) | Apr. 01, 2020 USD ($) | Sep. 30, 2021 USD ($) | Jun. 30, 2021 lease | Mar. 31, 2021 USD ($) property | Sep. 30, 2020 USD ($) lease | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) property | Apr. 30, 2020 USD ($) lease | Dec. 31, 2020 USD ($) lease property | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) lease | Sep. 30, 2021 USD ($) | Sep. 30, 2021 property | Sep. 30, 2021 state | Sep. 30, 2021 lease
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38 |  |
Number of states in which entity operates | state |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |
Number of impaired real estate properties, vacant | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |
Impairment of real estate investment properties |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 0 | $ 349,457 | $ 9,157,068 |  |  | $ 0 | $ 9,506,525 |  |  |  |
Impairment charge percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.10% |  | 2.20% |  |  |  | 0.10% |  |  |  |
Note receivable |  |  |  |  |  | $ 1,824,383 |  |  |  |  |  |  |  |  |  |  |  | $ 1,824,383 |  |  | $ 1,966,767 |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  |  |  |  |  | 4,242,771 |  |  | $ 1,693,642 |  |  |  |  | $ 4,532,413 | $ 1,693,642 |  |  |  |
Weighted-average remaining amortization period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 years 3 months 18 days |  |  |  |  |
Number of real estate properties identified as held-for-sale | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9 |  |  |  |  |  |
Number of real estate properties sold | lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |  |
Number of real estate properties, held-for-sale |  |  |  |  |  | 2 |  |  |  |  |  |  |  | 3 |  |  |  | 2 |  | 3 |  | 0 |  | 0
Number of real estate properties held for investment | lease |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |
Real estate investment held for investment |  |  |  |  |  | $ 329,456,639 |  |  |  |  |  |  |  |  |  |  |  | $ 329,456,639 |  |  | 329,689,217 |  |  |
24 Hour Fitness |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 115,133 |  |  |  |  |
Raising Cane's |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue related to acquisition |  |  |  |  |  |  |  |  |  |  | 47,004 |  |  |  |  |  |  |  | $ 47,004 |  |  |  |  |
Dana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly rent payments |  | $ 65,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Early termination fee |  | 1,381,767 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages | 24 Hour Fitness |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Monthly mortgage payment |  |  |  |  |  |  |  |  |  | $ 32,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Decrease in monthly mortgage payment |  |  |  |  |  |  |  |  |  | $ 8,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13 |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,943,462 |  |  |  |  |  | $ 15,943,462 |  |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,693,642 |  |  |  |
Number of real estate properties identified as held-for-sale | property |  |  |  |  |  |  |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | lease |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  | 4 |  |  |  |  |  |
Number of real estate properties, held-for-sale | lease |  |  |  |  |  | 4 |  |  |  |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |
Retail | 24 Hour Fitness |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of real estate investment properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,664,517 |  |  |  |
Retail | Raising Cane's |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate investment held for investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,620,000 |  |  |
Retail | Chevron Gas Station, Roseville property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  | $ 4,050,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  |  | 3,914,909 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  |  | $ 228,769 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | EcoThrift |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  | $ 5,375,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  | 2,684,225 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  | $ 51,415 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | Chevron Gas Station, San Jose property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  | $ 4,288,888 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  | 4,054,327 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  | $ 9,458 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | Rite Aid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  |  |  |  | $ 7,250,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  |  |  |  |  |  | 3,299,016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  |  |  | $ (422) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | Walgreens |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  |  |  | $ 5,538,462 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  |  |  |  |  | 5,296,356 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  |  | $ 1,306,768 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating leases extension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |
Retail | Island Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, consideration |  |  |  |  |  |  | $ 3,155,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  |  |  |  | 1,124,016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments |  |  |  |  |  |  | $ 387,296 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | Walgreens Santa Maria and Stockbridge |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment of lease incentives |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 990,000 |  |  |  |  |  |  |
Number of operating leases with lease incentives | lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Retail | Walgreens |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating leases extension |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |
Real estate investment held for investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,326,706 |  |  |
Retail | PreK Education |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate payment of lease incentives |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Operating leases extension |  |  |  |  |  |  |  |  |  |  | 8 years |  |  |  |  |  |  |  | 8 years |  |  |  |  |
Retail | Harley Davidson |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of real estate investment properties |  |  |  |  |  | $ 632,233 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate held for sale |  |  |  |  |  | $ 12,010,919 |  |  |  |  |  |  |  |  |  |  |  | $ 12,010,919 |  |  | 11,860,000 |  |  |
Impairment reversal of real estate properties |  |  |  |  |  |  |  |  |  |  | $ 400,999 |  |  |  |  |  |  |  |  |  |  |  |  |
Retail | Harley Davidson | Scenario, Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,117,500 |  |  |  |  |  |  |  |  |  |  |
Real estate investment held for investment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,779,687 |  |  |
Office |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |  |
Industrial |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties | property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 |  |
Number of real estate properties identified as held-for-sale | property |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |
Number of real estate properties sold | lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |
Industrial | Dana |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of real estate investment properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,184,395 |  |  |  |
Disposal group, including discontinued operation, consideration |  | 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of real estate investments |  | $ 4,975,334 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate investments | $ 4,127,638 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Industrial | Rite Aid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of real estate investment properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 349,457 |  |  |  |

X
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- Definition Number of Real Estate Properties, Sold + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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