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Investments in Available-for-Sale Securities
 12 Months Ended
Dec. 31, 2015
Available-For-Sale Securities [Abstract]  
Available For Sale Securities Disclosure [Text Block]
4.  Investments in Available-for-Sale Securities
 
The following is a summary of the Company’s investments in available-for-sale securities as of December 31, 2015:
 
 
 
 
 
Unrealized
 
Unrealized
 
 
 
 
 
Cost
 
Gains
 
Losses
 
Fair Value
 
U.S. federal agency securities
 
$
4,830
 
$
55
 
$
-
 
$
4,885
 
Municipal securities
 
 
492,237
 
 
789
 
 
(980)
 
 
492,046
 
Certificates of deposit
 
 
1,256,649
 
 
20,182
 
 
(14,865)
 
 
1,261,966
 
Corporate debt securities
 
 
17,173
 
 
115
 
 
-
 
 
17,288
 
 
 
$
1,770,889
 
$
21,141
 
$
(15,845)
 
$
1,776,185
 
 
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 Company’s investment portfolio had a net realized gain of $2,611 and a net realized loss of $12,381 for the years ended December 31, 2015 and 2014, respectively.  The Company’s investment portfolio has thirty-six positions with an unrealized loss as of December 31, 2015.
 
The cost and fair value of investments in fixed income available-for-sale debt securities, by contractual maturity, as of December 31, 2015, are as follows:
 
 
 
 
 
Fair
 
 
 
Cost
 
Value
 
Due within one year
 
$
1,004,435
 
$
1,018,896
 
Due after one year through three years
 
 
565,646
 
 
556,763
 
Due after three years
 
 
200,808
 
 
200,526
 
 
 
$
1,770,889
 
$
1,776,185
 
 
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.