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Fair Value Measurement (Tables)
 12 Months Ended
Dec. 31, 2023
Fair Value Measurement [Abstract]  
Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value of Financial Assets
The following table shows the adjusted cost, gross unrealized gains, gross unrealized losses, and fair value of our financial assets as of December 31, 2023 and 2022 (in thousands):

 
December 31, 2023
  
   
Adjusted
Cost
    
Unrealized
Gains
    
Unrealized
Losses
    
Fair
Value
    
Cash
and Cash
Equivalents
    
Investments
Available
for Sale
  
Cash
  
$
1,452
    
$
—
    
$
—
    
$
1,452
    
$
1,452
    
$
—
  
Level 1:
                                                
Mutual funds
    
20,040
      
—
      
—
      
20,040
      
20,040
      
—
  
U.S. agency and treasury securities
    
32,046
      
27
      
(18
)
    
32,055
      
4,797
      
27,258
  
     
52,086
      
27
      
(18
)
    
52,095
      
24,837
      
27,258
  
Total
  
$
53,538
    
$
27
    
$
(18
)
  
$
53,547
    
$
26,289
    
$
27,258
  

 
December 31, 2022
  
   
Adjusted
Cost
    
Unrealized
Gains
    
Unrealized
Losses
    
Fair
Value
    
Cash
and Cash
Equivalents
    
Investments
Available
for Sale
  
Cash
  
$
16,949
    
$
—
    
$
—
    
$
16,949
    
$
16,949
    
$
—
  
Level 1:
                                                
Mutual funds
    
66,493
      
—
      
—
      
66,493
      
66,493
      
—
  
U.S. agency and treasury securities
     68,958       9       (386 )     68,581       3,119       65,462  
     
135,451
      
9
      
(386
)
    
135,074
      
69,612
      
65,462
  
Total
  
$
152,400
    
$
9
    
$
(386
)
  
$
152,023
    
$
86,561
    
$
65,462