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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Restricted Common Share Awards (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]    
Recognized cost for restricted stock issued as compensation $ 1,200,214 $ 1,074,038
Recognized cost for restricted stock issued as compensation $ 1,200,214 $ 1,074,038