Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Accounts Receivable (Details)

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Summary of Significant Accounting Policies - Accounts Receivable (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
customer
Sep. 30, 2011
customer
Sep. 30, 2012
customer
Sep. 30, 2011
customer
Dec. 31, 2011
customer
Changes in the Allowance for Doubtful Accounts [Roll Forward]          
Allowance for doubtful accounts, beginning of period     $ 1,135,391 $ 1,677,278  
Charges to costs and expenses 6,024 154 83,767 24,374  
Account write-offs and other     (124,634) 4,915  
Allowance for doubtful accounts, end of period $ 1,094,524 $ 1,706,567 $ 1,094,524 $ 1,706,567  
Accounts Receivable Additional Disclosures [Abstract]          
Number of major customer accounting for more than 10% of Company's total accounts receivable 0   0   0
Number of major customer accounting for more than 10% of Company's total revenue 0 0 0 0