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Accrued Sales Taxes and Regulatory Fees	12 Months Ended
Accrued Sales Taxes and Regulatory Fees	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued Sales Taxes and Regulatory Fees	Accrued Sales Taxes and Regulatory Fees Included in accrued sales taxes and regulatory fees are (i) certain estimated sales and use taxes and regulatory fees and (ii) sales taxes and regulatory fees collected from customers that are to be remitted to taxing authorities. Actual payments may vary from our estimates. Accrued sales taxes and regulatory fees as of December 31, 2016 and 2015 were $395,000 and $441,000, respectively.