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Cash Equivalents and Investments
 3 Months Ended
Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents and Investments
3.
Cash Equivalents and Investments:
As of March 31, 2020 and December 31, 2019, the Company’s cash equivalents consisted entirely of money market funds totaling $6.4 million and $16.8 million, respectively. Investments consisted of corporate securities, municipal debt securities, federal home loan securities and certificates of deposit. All investments are classified as current.
Investments held at March 31, 2020 and December 31, 2019 are summarized as follows (in thousands):
 
March 31, 2020
 
  
December 31, 2019
 
Corporate securities
  $
46,883
    $
32,962
  
Municipal debt securities
   
23,327
     
29,066
  
Federal home loan securities
   
8,052
     
8,013
  
Certificates of deposit
   
6,779
     
4,469
  
                 
   $
85,041
    $
74,510