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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Taxes [Line Items]    
Deferred tax asset $ 5,131,179 $ 5,451,118
Accumulated net operating losses $ 4,400,000  
Loss carryforwards, expired 2028  
Deferred tax asset nondeductible accrued expenses $ 700,000 600,000
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 $ 4,400,000 $ 4,900,000