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Investment in Available-for-Sale Securities
 12 Months Ended
Dec. 31, 2012
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 investment in available-for-sale securities as of December 31, 2012:

 

    Cost     Unrealized
Gains		     Unrealized
Losses		     Fair Value  
U.S. federal agency securities   $ 19,592     $ 196     $ -     $ 19,788  
Municipal securities     1,154,888       2,882       (2,137 )     1,155,633  
Certificates of deposit     1,193,494       8,734       (16,904 )     1,185,324  
Corporate debt securities     285,524       4,164       (9,633 )     280,055  
Equity securities – ClearSign common stock     7,905       9,485       -       17,390  
    $ 2,661,403     $ 25,461     $ (28,674 )   $ 2,658,190  

 

The following is a summary of the Company’s investment in available-for-sale securities as of December 31, 2011:

 

    Cost     Unrealized
Gains		     Unrealized
Losses		     Fair Value  
U.S. federal agency securities   $ 15,153     $ 411     $ -     $ 15,564  
Corporate debt securities     1,725,402       11,154       (13,970 )     1,722,586  
Certificates of deposit     776,244       1,222       (23,843 )     753,623  
    $ 2,516,799     $ 12,787     $ (37,813 )   $ 2,491,773  

 

The Company’s investment portfolio had a net realized loss of $30,440and $5,919 for the years ended December 31, 2012 and 2011, respectively.  The Company’s investment portfolio has thirty-two positions with an unrealized loss as of December 31, 2012.

 

The cost and fair value of investment in fixed income available-for-sale debt securities, by contractual maturity, as of December 31, 2012, are as follows:

 

    Cost     Fair
 Value		  
Due within one year   $ 684,032     $ 661,329  
Due after one year through three years     731,410       733,771  
Due after three years     1,238,056       1,245,700  
    $ 2,653,498     $ 2,640,800  

 

 

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 investment in available-for-sale debt securities as current assets in the accompanying balance sheets.