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Cash and Cash Equivalents
9 Months Ended
Sep. 30, 2018
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents

4. Cash and Cash Equivalents

Cash and cash equivalents of approximately $32,412 and $24,103 at September 30, 2018 and December 31, 2017, respectively, were held at one financial institution. At September 30, 2018 and December 31, 2017, cash equivalents were approximately $5,722 and $26,548, respectively.