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Fair Value of Financial Instruments (Details) (USD $)
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2011
Cash and cash equivalents, Carrying Amount $ 5,806,437 $ 6,273,015 $ 6,881,093
Trade accounts receivable, Carrying Amount 2,974,641 3,158,084  
Trade accounts payable, Carrying Amount 2,208,999 1,507,695  
Notes receivable - short term, Carrying Amount 0 198,117  
Cash and cash equivalents, Fair Value 5,806,437 6,273,015  
Trade accounts receivable, Fair Value 2,974,641 3,158,084  
Trade accounts payable, Fair Value 2,208,999 1,507,695  
Notes receivable - short term, Fair Value $ 0 $ 198,117