Quarterly report pursuant to Section 13 or 15(d)

K. Sales Tax Accrual (Details)

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K. Sales Tax Accrual (Details) (USD $)
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Change in the sales tax accrual    
Balance, January 1, 2012 $ 1,188,133 $ 1,068,314
Collections 299,614 277,374
Provisions (120,923) (119,255)
Interest and penalties 7,342 32,696
Payments (295,963) (70,996)
Balance, June 30, 2013 $ 1,078,203 $ 1,188,133