INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Held-to-maturity Securities

The following tables summarize our investment securities at June 30, 2016 and December 31, 2015:

	June 30, 2016
	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 July 2016 and June 2017) (held-to-maturity)	$	25,680,319	$	22,601	$	--	$	25,702,920
Long-term investments:
Obligations of domestic governmental agencies (maturing between July 2017 and January 2018) (held-to-maturity)		21,435,015		80,328		--		21,515,343
Total short-term and long-term investment securities	$	47,115,334	$	102,929	$	--	$	47,218,263

	December 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 January 2016 and December 2016) (held-to-maturity)	$	22,166,512	$	--	$	22,822	$	22,143,690
Long-term investments:
Obligations of domestic governmental agencies (maturing between January 2017 and December 2017) (held-to-maturity)		25,003,032		--		85,846		24,917,186
Total short-term and long-term investment securities	$	47,169,544	$	--	$	108,668	$	47,060,876