Investment in Available-for-Sale Securities (Tables)

6 Months Ended

Jun. 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 June 30, 2015 (unaudited):

			Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
U.S. federal agency securities	$	49,783	$	90	$	(23)	$	49,850
Municipal securities		636,997		756		(2,444)		635,309
Certificates of deposit		1,470,167		22,263		(14,382)		1,478,048
Corporate debt securities		17,421		354		-		17,775
	$	2,174,368	$	23,463	$	(16,849)	$	2,180,982

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 June 30, 2015 (unaudited), are as follows:

			Fair
	Cost		Value
Due within one year	$	667,289	$	663,362
Due after one year through three years		1,159,142		1,170,996
Due after three years		347,937		346,624
	$	2,174,368	$	2,180,982