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Investments (Tables)
9 Months Ended
Sep. 30, 2021
Investments [Abstract]  
Investments consists of available-for-sale securities

Investments consists of available-for-sale securities as follows (in thousands):

 

 

 

September 30, 2021

 

 

 

Amortized Cost

 

 

Unrealized Gain

 

 

Unrealized Loss

 

 

Estimated Fair Value

 

Short-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government debt securities

 

$

 

 

$

 

 

$

 

 

$

 

Corporate bonds

 

 

83,208

 

 

 

 

 

 

(9

)

 

 

83,199

 

Total short-term marketable securities

 

$

83,208

 

 

$

 

 

$

(9

)

 

$

83,199

 

Long-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government debt securities

 

$

3,995

 

 

$

 

 

$

 

 

$

3,995

 

Corporate bonds

 

 

19,633

 

 

 

 

 

 

(9

)

 

 

19,624

 

Total long-term marketable securities

 

$

23,628

 

 

$

 

 

$

(9

)

 

$

23,619