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Marketable Securities (Details) (USD $)
Mar. 31, 2014
Dec. 31, 2013
Fair value of marketable securities, by type    
Fair value of marketable securities $ 13,531,808 $ 14,019,761
U.S. Treasury notes and bonds
    
Fair value of marketable securities, by type    
Fair value of marketable securities 2,344,984 2,829,809
U.S. Agency issued mortgage-backed securities – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 2,960,270 3,049,754
U.S. Agency notes and bonds – fixed rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 1,746,841 1,496,700
SBA loan pools – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 1,584,713 1,748,498
Municipal bonds – VRDN
    
Fair value of marketable securities, by type    
Fair value of marketable securities 4,895,000 4,895,000
Level 1
    
Fair value of marketable securities, by type    
Fair value of marketable securities 7,239,984 7,724,809
Level 1 | U.S. Treasury notes and bonds
    
Fair value of marketable securities, by type    
Fair value of marketable securities 2,344,984 2,829,809
Level 1 | U.S. Agency issued mortgage-backed securities – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 0 0
Level 1 | U.S. Agency notes and bonds – fixed rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 0 0
Level 1 | SBA loan pools – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 0 0
Level 1 | Municipal bonds – VRDN
    
Fair value of marketable securities, by type    
Fair value of marketable securities 4,895,000 4,895,000
Level 2
    
Fair value of marketable securities, by type    
Fair value of marketable securities 6,291,824 6,294,952
Level 2 | U.S. Treasury notes and bonds
    
Fair value of marketable securities, by type    
Fair value of marketable securities 0 0
Level 2 | U.S. Agency issued mortgage-backed securities – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 2,960,270 3,049,754
Level 2 | U.S. Agency notes and bonds – fixed rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 1,746,841 1,496,700
Level 2 | SBA loan pools – variable rate
    
Fair value of marketable securities, by type    
Fair value of marketable securities 1,584,713 1,748,498
Level 2 | Municipal bonds – VRDN
    
Fair value of marketable securities, by type    
Fair value of marketable securities $ 0 $ 0