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Non-cash Financing and Investing Activities	9 Months Ended
Non-cash Financing and Investing Activities	Sep. 30, 2018
Noncash Investing And Financing Items [Abstract]
Non-cash Financing and Investing Activities	14. Non-cash Financing and Investing Activities During the nine months ended September 30, 2018, the Company had non-cash investing activities for the issuance of 163,137 shares of its Class A common stock related to our acquisition purchases. The issuance had an approximate value of $12,282. There were no significant non-cash investing activities for the nine months ended September 30, 2017. Also, there were no significant non-cash financing activities during the nine months ended September 30, 2018 or 2017.