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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