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Real Estate and Intangible Assets - Additional Information (Details) $ in Thousands |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 25, 2020 USD ($) a | Feb. 10, 2020 USD ($) farm | Aug. 29, 2019 USD ($) | Jul. 31, 2020 tenant | May 31, 2020 USD ($) | Sep. 30, 2020 USD ($) a | Sep. 30, 2019 USD ($) a | Sep. 30, 2020 USD ($) a farm tenant | Sep. 30, 2019 USD ($) a farm | Apr. 30, 2020 a | Dec. 31, 2019 USD ($)
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  | 123 | 105 |  |
Depreciation expense |  |  |  |  |  | $ 3,600 | $ 3,000 | $ 10,600 | $ 7,800 |  |
Tenant improvements, net of depreciation |  |  |  |  |  | 2,000 |  | 2,000 |  |  | $ 2,200
Tenant improvements, depreciation and rental revenue |  |  |  |  |  | 76 | 72 | 228 | 218 |  |
Amortization expense related to intangible assets |  |  |  |  |  | 294 | 460 | 1,400 | 1,100 |  |
Amortization of acquired above market lease values and deferred revenue |  |  |  |  |  | 32 | 31 | 94 | 97 |  |
Total accretion related to below-market lease values and deferred revenue |  |  |  |  |  | $ 28 | $ 46 | $ 78 | $ 123 |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 92,601 | 81,586 | 92,601 | 81,586 |  |
Gain (loss) on lease termination |  |  |  |  |  |  |  | $ 3,000 |  |  |
LLC ownership, percentage |  |  |  |  |  |  |  | 37.50% |  |  |
(Loss) income from investments in unconsolidated entities |  |  |  |  |  |  |  | $ 7 | $ 0 |  |
Number of tenants | tenant |  |  |  | 2 |  |  |  | 73 |  |  |
Lease revenue |  |  |  |  |  | $ 13,989 | $ 11,012 | $ 41,907 | $ 27,203 |  |
Percent of rental revenue (as percent) |  |  |  |  |  |  |  | 100.00% | 100.00% |  |
Fresno, CA |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
LLC ownership, value |  |  |  |  |  | $ 874 |  | $ 874 |  |  | $ 587
California |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  | 46 | 41 |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 17,954 | 13,731 | 17,954 | 13,731 |  |
LLC ownership, value |  |  |  |  |  | $ 874 |  | $ 874 |  |  |
Lease revenue |  |  |  |  |  |  |  | $ 22,153 | $ 13,872 |  |
Percent of rental revenue (as percent) |  |  |  |  |  |  |  | 52.90% | 51.00% |  |
Florida |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  | 23 | 23 |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 20,770 | 20,770 | 20,770 | 20,770 |  |
Lease revenue |  |  |  |  |  |  |  | $ 10,006 | $ 7,785 |  |
Percent of rental revenue (as percent) |  |  |  |  |  |  |  | 23.90% | 28.60% |  |
Arizona |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  | 6 | 6 |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 6,280 | 6,280 | 6,280 | 6,280 |  |
Number of farms terminated | farm |  | 4 |  |  |  |  |  |  |  |  |
Gain (loss) on lease termination |  | $ 3,000 |  |  |  |  |  |  |  |  |
Number of farms subject to renewal | farm |  | 2 |  |  |  |  |  |  |  |  |
Prepaid rent |  |  |  |  |  | $ 89 |  | $ 89 |  |  |
Allowance for credit loss, writeoff |  | $ 254 |  |  |  |  |  | 470 |  |  |
Lessor leasing arrangement lease term (in years) |  | 7 years |  |  |  |  |  |  |  |  |
Lease revenue |  |  |  |  |  |  |  | $ 4,272 | $ 1,609 |  |
Percent of rental revenue (as percent) |  |  |  |  |  |  |  | 10.20% | 5.90% |  |
Napa, CA |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 270 |  | 270 |  |  |
Napa, CA | Withers Road |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Area of real estate property (in acres) | a | 47 |  |  |  |  |  |  |  |  | 38.7 |
Additional compensation payments | $ 40 |  | $ 4,000 |  | $ 3,200 |  |  |  |  |  |
Annualized straight-line rent |  |  |  |  | $ 335 |  |  |  |  |  |
2020 Acquisitions |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  | 12 |  |  |
Operating revenue |  |  |  |  |  | $ 527 |  | $ 808 |  |  |
Net income |  |  |  |  |  | $ 253 |  | $ 448 |  |  |
Area of real estate property (in acres) | a |  |  |  |  |  | 6,066 |  | 6,066 |  |  |
Annualized straight-line rent |  |  |  |  |  |  |  | $ 3,571 |  |  |
2019 Acquisitions |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  |  | 20 |  |
Operating revenue |  |  |  |  |  |  | $ 2,200 |  | $ 2,800 |  |
Net income |  |  |  |  |  |  | $ 574 |  | $ 793 |  |
Area of real estate property (in acres) | a |  |  |  |  |  |  | 8,381 |  | 8,381 |  |
Annualized straight-line rent |  |  |  |  |  |  |  |  | $ 13,040 |  |
2019 Acquisitions | Napa, CA | Withers Road |  |  |  |  |  |  |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of farms | farm |  |  |  |  |  |  |  |  | 1 |  |
Area of real estate property (in acres) | a | 47 |  |  |  |  |  | 366 |  | 366 |  |
Annualized straight-line rent |  |  |  |  |  |  |  |  | $ 2,256 |  |

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