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Cash and Cash Equivalents (Tables)
12 Months Ended
Dec. 31, 2017
Cash, Cash Equivalents, and Short-term Investments [Abstract]  
Schedule of Cash and Cash Equivalents
Cash and cash equivalents consisted of the following (in thousands):
 
 
December 31,
 
 
2017
 
2016
Cash and cash equivalents:
 
 
 
 
Cash
 
$
48,855

 
$
38,053

Money market funds
 
20,092

 
20,069

Total cash and cash equivalents
 
$
68,947

 
$
58,122