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Cash and Cash Equivalents
12 Months Ended
Dec. 31, 2018
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents
4. Cash and Cash Equivalents
Cash and cash equivalents of approximately $34,398 and $24,103 at December 31, 2018 and December 31, 2017, respectively, were held at one financial institution. At December 31, 2018 and December 31, 2017, cash equivalents were approximately $24 and $26,548, respectively.
 
In addition, certain of our subsidiaries of our International Business segment are required to maintain a minimum level of net liquid assets, which was $11,005 and $1,026 at December 31, 2018 and December 31, 2017, respectively. These requirements are generally satisfied by cash on hand.