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INVESTMENT SECURITIES (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2017
Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]    
Amortized cost, as adjusted $ 8,808,930 $ 19,853,860
Gross unrealized holding gains 0 3,270
Gross unrealized holding losses 3,005 2,492
Estimated fair value 8,805,925 19,854,638
Short-term Investments [Member] | US Government Agencies Debt Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized cost, as adjusted 8,808,930 19,853,860
Gross unrealized holding gains 0 3,270
Gross unrealized holding losses 3,005 2,492
Estimated fair value $ 8,805,925 $ 19,854,638