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Available-for-Sale Securities (Details 1) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Gross unrealized loss and fair value of available-for-sale securities, aggregated by the length of time    
Less Than 12 Months, Fair Value $ 28,513,200 $ 13,299,782
Less Than 12 Months, Unrealized Loss (287,841) (896,436)
12 Months or More, Fair Value 5,643,891 68,309
12 Months or More, Unrealized Loss (356,109) (408)
Total, Fair Value 34,157,091 13,368,091
Total, Unrealized Loss (643,950) (896,844)
U. S. Government agency mortgage-backed securities [Member]
    
Gross unrealized loss and fair value of available-for-sale securities, aggregated by the length of time    
Less Than 12 Months, Fair Value 25,670,832 4,941,662
Less Than 12 Months, Unrealized Loss (130,209) (5,492)
12 Months or More, Fair Value   68,309
12 Months or More, Unrealized Loss   (408)
Total, Fair Value 25,670,832 5,009,971
Total, Unrealized Loss (130,209) (5,900)
Corporate bonds [Member]
    
Gross unrealized loss and fair value of available-for-sale securities, aggregated by the length of time    
Less Than 12 Months, Fair Value 2,842,368 8,358,120
Less Than 12 Months, Unrealized Loss (157,632) (890,944)
12 Months or More, Fair Value 5,643,891  
12 Months or More, Unrealized Loss (356,109)  
Total, Fair Value 8,486,259 8,358,120
Total, Unrealized Loss $ (513,741) $ (890,944)