XML 32 R20.htm IDEA: XBRL DOCUMENT v3.19.1
Cash Equivalents and Investments (Tables)
3 Months Ended
Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investments
 
  
March 31, 2019
  
December 31, 2018
 
  
Short-Term
  
Long-Term
  
Short-Term
  
Long-Term
 
Municipal debt securities
 $45,111  $—    $18,473  $30,841 
Federal home loan securities
  35,234   —     2,000   34,393 
Certificates of deposit
  5,878   —     1,450   4,465 
  
 
 
  
 
 
  
 
 
  
 
 
 
  $86,223  $—    $21,923  $69,699