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COMMON STOCK AND NON-CONTROLLING INTEREST - Schedule of Fair Value of Restricted Stock (Details) - Restricted Stock - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Fair value of restricted shares vested $ 1,478,051 $ 570,011
Unrecognized compensation cost for restricted shares $ 3,445,031 $ 3,909,212
Weighted average remaining period to expense for restricted shares (years) 2 years 5 months 12 days 3 years 12 days