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Financial Instruments (Details) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Financial Instruments (Textual) [Abstract]    
Percentage of fixed rate of interest carrying amount of notes receivables 6.00%  
Carrying amount of notes receivable from related parties $ 2,582,476 $ 2,656,067
Fair value of notes receivable 2,800,000 2,900,000
Long-term debt $ 115,750,000 $ 116,750,000