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Investments (Tables)
 3 Months Ended
Mar. 31, 2013
Investments, Debt and Equity Securities [Abstract]  
Held-to-maturity Securities [Table Text Block]

At March 31, 2013 and December 31, 2012 all investments were classified as held to maturity and consisted of the following:

                  Certificates of Deposit     Maturity                Value of Held to Maturity
Investment Date Investments (based on cost)
$ 2,000,000    04-18-13   $ 2,000,000
$ 2,000,000 10-17-13   $ 2,000,000  
$ 500,940   06-29-13   $ 500,940  
$ 300,564 04-06-13 $ 300,564
$ 251,417 06-29-13 $ 251,417
$ 5,052,921