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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) (Allowance for Doubtful Accounts [Member], USD $)
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12 Months Ended | |||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Allowance for Doubtful Accounts [Member]
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| 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 | |||
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