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Investment in Available-for-Sale Securities
 6 Months Ended
Jun. 30, 2015
Available-For-Sale Securities [Abstract]  
Available For Sale Securities Disclosure [Text Block]
4.  Investment in Available-for-Sale Securities
 
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
 
 
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
 
 
Expected maturities will differ from contractual maturities because the issuers of certain debt securities have the right to call or prepay their obligations without any penalties.  The Company has classified the entire fair value of its investments in available-for-sale debt securities as current assets in the accompanying balance sheets.