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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Income Taxes [Line Items] |  |
Deferred tax asset | $ 5,190,855 | $ 5,451,118
Accumulated net operating losses | 4,600,000 | 4,900,000
Deferred tax asset nondeductible accrued expenses | $ 600,000 | 500,000
Loss carryforwards, expired | 2028 |
Reduction in deferred tax assets due to change in federal income tax rate | $ 2,700,000 |
TRS Lessee [Member] |  |
Income Taxes [Line Items] |  |
Accumulated net operating losses | $ 4,600,000 | $ 4,900,000

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