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Investment in Available-for-Sale Securities (Details Textual) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]        
Gain (Loss) on Investments $ 3,786 $ 25,104 $ 11,888 $ 14,118