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Amortized Cost and Fair Value of Securities Available for Sale, by Contractual Maturity (Detail) (USD $)
Jun. 30, 2012
Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]    
One to five years $ 2,009,320  
Five to ten years 2,085,500  
Over ten years 19,176,262  
Fair Value 23,271,082 8,946,674
One to five years 2,000,000  
Five to ten years 2,092,755  
Over ten years 18,871,442  
Total $ 22,964,197 $ 8,950,000