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Summary of Significant Accounting Policies - Accounts Receivable (Details) (USD $)
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3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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| Changes in the Allowance for Doubtful Accounts [Roll Forward] | ||||
| Allowance for doubtful accounts, beginning of period | $ 1,174,458 | $ 1,135,391 | ||
| Charges to costs and expenses | (328,969) | (24,107) | (371,308) | (77,743) |
| Account write-offs and other | (25,134) | (111,721) | ||
| Allowance for doubtful accounts, end of period | $ 1,520,632 | $ 1,101,413 | $ 1,520,632 | $ 1,101,413 |
| X | ||||||||||
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- Definition
Allowance for Doubtful Accounts Receivable, Charge-offs and Other No definition available.
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| X | ||||||||||
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- Definition
For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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