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Real Estate and Intangible Assets - Additional Information (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) tenant farm | Mar. 31, 2018 USD ($) farm | Dec. 31, 2018 USD ($) farm
Real Estate Properties [Line Items] |  |  |
Number of farms | farm | 86 | 75 |
Depreciation expense | $ 2,300 | $ 1,900 |
Tenant improvements, net of depreciation | 2,300 |  | $ 2,400
Tenant improvements, depreciation and rental revenue | 74 | 76 |
Lease Revenue | 7,830 |  |
Amortization expense related to intangible assets | 324 | 293 |
Amortization of acquired above market lease values and deferred revenue | 33 | 2 |
Total accretion related to below-market lease values and deferred revenue | $ 38 | $ 17 |
Number of tenants | tenant | 64 |  |
Percent of rental revenue (as percent) | 100.00% | 100.00% |
Tenant A |  |  |
Real Estate Properties [Line Items] |  |  |
Number of farms | farm | 5 |  |
Lease Revenue | $ 1,100 |  |
Percent of rental revenue (as percent) | 14.10% |  |
California |  |  |
Real Estate Properties [Line Items] |  |  |
Number of farms | farm | 33 |  | 29
Lease Revenue | $ 3,734 |  |
Percent of rental revenue (as percent) | 47.70% |  | 45.30%
Florida |  |  |
Real Estate Properties [Line Items] |  |  |
Number of farms | farm | 22 |  | 16
Lease Revenue | $ 2,339 |  |
Percent of rental revenue (as percent) | 29.90% |  | 26.20%

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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