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FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets Measured on a Nonrecurring Basis (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
a
Dec. 31, 2016
USD ($)
a
Fair value of financial instruments      
Impairment charges   $ 2,180,730  
Undeveloped Land      
Fair value of financial instruments      
Impairment charges $ 0 $ 1,000,000  
Land Under Contract for Sale | Undeveloped Land      
Fair value of financial instruments      
Area of Land | a   6 8
Impairment charges     $ 1,000,000
Nonrecurring basis      
Fair value of assets      
Asset fair value $ 0