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Short-Term Investments (Tables)
9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Short-term Investments Classified as Available-for-sale

Short-term investments, which are classified as available-for-sale, consisted of the following:

 

Balance at September 30, 2022:

 

Amortized
Cost Basis

 

 

Unrealized
Loss

 

 

Fair
Value

 

 

 

(in thousands)

 

Treasury bills

 

$

5,999

 

 

$

(1

)

 

$

5,998

 

Commercial paper

 

 

30,957

 

 

 

 

 

 

30,957

 

Corporate debt securities

 

 

18,074

 

 

 

(170

)

 

 

17,904

 

Total short-term investments

 

$

55,030

 

 

$

(171

)

 

$

54,859

 

 

 

Balance at December 31, 2021:

 

Amortized
Cost Basis

 

 

Unrealized
Loss

 

 

Fair
Value

 

 

 

(in thousands)

 

Commercial paper

 

$

33,979

 

 

$

(1

)

 

$

33,978

 

Corporate debt securities

 

 

11,953

 

 

 

(4

)

 

 

11,949

 

Total short-term investments

 

$

45,932

 

 

$

(5

)

 

$

45,927