INVESTMENT SECURITIES (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Held-to-maturity Securities [Table Text Block]

The following tables summarize our investment securities at March 31, 2015 and December 31, 2014:

	March 31, 2015
	Amortized cost, as adjusted		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
Short-term investments:
Obligations of domestic governmental agencies (maturing between April 2015 and December 2015) (held-to-maturity)	$	19,131,437	$	2,910	$	217	$	19,134,130
Total short-term investment securities	$	19,131,437	$	2,910	$	217	$	19,134,130

	December 31, 2014
	Amortized cost, as adjusted		Gross unrealized holding gains		Gross unrealized holding losses		Estimated fair value
Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2015 and December 2015) (held-to-maturity)	$	23,062,034	$	922	$	5,806	$	23,057,150
Total short-term investment securities	$	23,062,034	$	922	$	5,806	$	23,057,150