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Investment Securities (Tables)
12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Investment Securities
Investment securities consisted of the following (in thousands):
 
 
  
December 31, 2022
 
 
  
Amortized
Cost
 
  
Unrealized
Gains
 
  
Unrealized
(Losses)
 
  
Estimated
Fair
Value
 
U.S. Government Agency Securities
   $ 188,465      $ 14      $ (1,729    $ 186,750  
FDIC Certificates of Deposit
     4,155        3        (72      4,086  
Certificates of Deposit
     7,500        —          —          7,500  
Commercial Paper
     100,711        3        (269      100,445  
Corporate Notes/Bonds
     189,588        1        (2,141      187,448  
    
 
 
    
 
 
    
 
 
    
 
 
 
    
$
490,419
 
  
$
21
 
  
$
(4,211
  
$
486,229
 
    
 
 
    
 
 
    
 
 
    
 
 
 
 
 
  
December 31, 2021
 
 
  
Amortized
Cost
 
  
Unrealized
Gains
 
  
Unrealized
(Losses)
 
  
Estimated
Fair
Value
 
U.S. Government Agency Securities
   $ 71,752      $ —        $ (100    $ 71,652  
Certificates of Deposit
     26,232        1        —          26,233  
Commercial Paper
     55,955        —          (36      55,919  
Corporate Notes/Bonds
     166,394        19        (249      166,164  
    
 
 
    
 
 
    
 
 
    
 
 
 
    
$
320,333
 
  
$
20
 
  
$
(385
)
 
  
$
319,968