Investment in Available-for-Sale Securities (Tables)

9 Months Ended

Sep. 30, 2015

Available-For-Sale Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The following is a summary of the Company’s investments in available-for-sale securities as of September 30, 2015 (unaudited):

			Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
U.S. federal agency securities	$	4,808	$	92	$	-	$	4,900
Municipal securities		519,333		1,429		(627)		520,135
Certificates of deposit		1,450,538		15,571		(13,819)		1,452,290
Corporate debt securities		17,298		381		-		17,679
	$	1,991,977	$	17,473	$	(14,446)	$	1,995,004

The following is a summary of the Company’s investments in available-for-sale securities as of December 31, 2014:

			Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
U.S. federal agency securities	$	49,739	$	68	$	(117)	$	49,690
Municipal securities		441,372		463		(966)		440,869
Certificates of deposit		1,395,990		22,904		(14,861)		1,404,033
Corporate debt securities		37,911		298		-		38,209
	$	1,925,012	$	23,733	$	(15,944)	$	1,932,801

Available-for-sale Securities [Table Text Block]

The cost and fair value of investments in fixed income available-for-sale debt securities, by contractual maturity, as of September 30, 2015 (unaudited), are as follows:

			Fair
	Cost		Value
Due within one year	$	784,815	$	781,679
Due after one year through three years		929,334		935,184
Due after three years		277,828		278,141
	$	1,991,977	$	1,995,004