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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts [Member], USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
     
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at beginning of period $ 92,723 $ 92,723 $ 162,723
Charged to costs and expenses 81,198      
Deductions       70,000 [1]
Balance at end of period $ 173,921 $ 92,723 $ 92,723
[1] Recovery of previously reserved receivables.