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Income Taxes - Reconciliation of Statutory Federal Income Tax (Benefit) Provision (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Statutory federal income tax expense $ 1,705,610 $ (838,519) $ (1,012,349)
Effect of non-taxable REIT income (2,866,950) (898,576) 2,159,323
State income tax benefit (174,693) 9,372 349,122
Income tax provision (benefit) $ (1,336,033) $ (1,727,723) $ 1,496,096