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Investment Securities (Details) (USD $)
Sep. 30, 2012
Dec. 31, 2011
Amortized cost, gross unrealized gains, gross unrealized losses and approximate fair values of available-for-sale securities    
Amortized Cost $ 19,005,087 $ 66,253,296
Gross Unrealized Gains 2,998 1,113,520
Gross Unrealized Losses (693,154) (896,844)
Fair Value 18,314,931 66,469,972
U. S. Government agency bonds [Member]
   
Amortized cost, gross unrealized gains, gross unrealized losses and approximate fair values of available-for-sale securities    
Amortized Cost 7,500,000 5,000,000
Gross Unrealized Gains 2,978 37,085
Gross Unrealized Losses (11,065)  
Fair Value 7,491,913 5,037,085
U. S. Government agency mortgage-backed securities [Member]
   
Amortized cost, gross unrealized gains, gross unrealized losses and approximate fair values of available-for-sale securities    
Amortized Cost 2,505,087 49,004,232
Gross Unrealized Gains 20 1,051,097
Gross Unrealized Losses   (5,900)
Fair Value 2,505,107 50,049,429
Corporate bonds [Member]
   
Amortized cost, gross unrealized gains, gross unrealized losses and approximate fair values of available-for-sale securities    
Amortized Cost 9,000,000 12,249,064
Gross Unrealized Gains   25,338
Gross Unrealized Losses (682,089) (890,944)
Fair Value $ 8,317,911 $ 11,383,458