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Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 USD ($) Segment shares | Mar. 31, 2017 USD ($) | Dec. 31, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |
Federal Deposit Insurance Corporation protection limits | $ | $ 250,000 |  |
Un-amortized franchise fees | $ | 516,601 |  | $ 532,070
Amortization expense | $ | 17,032 | $ 31,452 |
Lease revenue | $ | 500,000 | 500,000 |
Deferred income taxes | $ | 5,190,855 |  | 5,451,118
Deferred tax assets related to net operating losses | $ | $ 4,600,000 |  | 4,900,000
Minimum percentage of likelihood of realization of deferred tax assets | 50.00% |  |
Deferred tax assets valuation allowance | $ | $ 0 |  |
Uncertain tax positions | $ | 0 |  | $ 0
Compensation cost recognized | $ | 171,523 | 94,140 |
Advertising cost | $ | 98,313 | 65,010 |
Gain on involuntary conversion of assets | $ | $ 870,741 | 1,041,815 |
Number of reportable segment | Segment | 1 |  |
Director [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued but not vested | shares | 15,000 |  |
Shares award vesting date | Dec. 31, 2018 |  |
2004 Plan [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 337,438 |  |
Termination year of stock based compensation plan | 2013 |  |
2004 Plan [Member] | Executives and Employees [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 255,938 |  |
2004 Plan [Member] | Director [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 81,500 |  |
Stock-based Compensation , Number of Shares, Vested | shares | 81,500 |  |
2013 Plan [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 163,350 |  |
Performance-based stock awards granted | shares | 0 |  |
2013 Plan [Member] | Executives and Employees [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 77,600 |  |
2013 Plan [Member] | Director [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued under plan | shares | 85,750 |  |
2013 Plan [Member] | One Employee [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Shares issued but not vested | shares | 25,000 |  |
Stock award vesting period | 5 years |  |
2004 and 2013 Plan [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Compensation cost recognized | $ | $ 8,025 | $ 4,980 |
Maximum [Member] | 2004 Plan [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restricted, unrestricted and performance stock awards permitted to grant to employees | shares | 350,000 |  |
Maximum [Member] | 2013 Plan [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Restricted, unrestricted and performance stock awards permitted to grant to employees | shares | 750,000 |  |
Buildings and Improvements [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 7 years |  |
Buildings and Improvements [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 39 years |  |
Furniture, Fixtures and Equipment [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 3 years |  |
Furniture, Fixtures and Equipment [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 10 years |  |

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