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Nature of Business and Basis of Presentation (Details Textual) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Apr. 01, 2018 | Jan. 31, 2018 USD ($) shares | Jun. 30, 2018 USD ($) Property $ / shares | Mar. 31, 2018 | Jun. 30, 2018 USD ($) Segment Property | Jun. 30, 2017 USD ($)
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |
Number of reportable operating segments | Segment |  |  |  |  | 2 |
Proceeds from issuance of common stock |  |  |  |  | $ 25,969 | $ 153
Decrease in depreciation expense |  |  | $ (2,100) |  |  |
Increase in net income |  |  | $ 1,700 |  |  |
Increase in earnings per share basic | $ / shares |  |  | $ 0.07 |  |  |
Increase in earnings per share diluted | $ / shares |  |  | $ 0.06 |  |  |
Building and Building Improvements [Member] |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |
Estimated useful lives | 19 years |  |  | 10 years |  |
Initial Public Offering [Member] |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |
Common stock shares resold by shareholders | shares |  | 6,500,000 |  |  |  |
Newly issued shares of common stock | shares |  | 975,000 |  |  |  |
Proceeds from issuance of common stock |  | $ 25,600 |  |  |  |
Nevada and Maryland [Member] |  |  |  |  |  |
Nature Of Business And Basis Of Presentation [Line Items] |  |  |  |  |  |
Number of resort casino properties | Property |  |  | 8 |  | 8 |

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