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Investments (Tables)
9 Months Ended
Sep. 30, 2022
Investments [Abstract]  
Investments consists of available-for-sale securities

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

 

 

 

September 30, 2022

 

 

 

Amortized Cost

 

 

Unrealized Gain

 

 

Unrealized Loss

 

 

Estimated Fair Value

 

Short-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

$

30,318

 

 

$

 

 

$

 

 

$

30,318

 

U.S. government debt securities

 

 

35,531

 

 

 

 

 

 

(227

)

 

 

35,304

 

Corporate bonds

 

 

21,367

 

 

 

 

 

 

(314

)

 

 

21,053

 

Total short-term marketable securities

 

$

87,216

 

 

$

 

 

$

(541

)

 

$

86,675

 

Long-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government debt securities

 

$

 

 

$

 

 

$

 

 

$

 

Corporate bonds

 

 

7,001

 

 

 

 

 

 

(40

)

 

 

6,961

 

Total long-term marketable securities

 

$

7,001

 

 

$

 

 

$

(40

)

 

$

6,961

 

 

 

 

December 31, 2021

 

 

 

Amortized Cost

 

 

Unrealized Gain

 

 

Unrealized Loss

 

 

Estimated Fair Value

 

Short-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

Commercial paper

 

$

54,363

 

 

$

 

 

$

(1

)

 

$

54,362

 

Corporate bonds

 

 

35,231

 

 

 

 

 

 

(35

)

 

 

35,196

 

Total short-term marketable securities

 

$

89,594

 

 

$

 

 

$

(36

)

 

$

89,558

 

Long-term marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government debt securities

 

$

3,996

 

 

$

 

 

$

(17

)

 

$

3,979

 

Corporate bonds

 

 

21,010

 

 

 

 

 

 

(70

)

 

 

20,940

 

Total long-term marketable securities

 

$

25,006

 

 

$

 

 

$

(87

)

 

$

24,919

 

 

Investments in a continual unrealized loss position

Investments in a continual unrealized loss position for less than 12 months consist of the following (in thousands):

 

 

 

September 30, 2022

 

 

December 31, 2021

 

 

 

Fair Value

 

 

Fair Value

 

Corporate bonds

 

$

15,425

 

 

$

60,114

 

U.S. government debt securities

 

 

26,508

 

 

 

 

Commercial paper

 

 

 

 

 

3,995

 

Total available-for-sale securities

 

$

41,933

 

 

$

64,109

 

 

Investments in a continual unrealized loss position for greater than 12 months consist of the following (in thousands):

 

 

 

September 30, 2022

 

 

December 31, 2021

 

 

 

Fair Value

 

 

Fair Value

 

Corporate bonds

 

$

12,589

 

 

$

 

U.S. government debt securities

 

 

3,910

 

 

 

 

Total available-for-sale securities

 

$

16,499

 

 

$