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Short-term Investments
12 Months Ended
Dec. 31, 2022
Short-Term Investments [Abstract]  
Short-term Investments

4. Short-term Investments

The fair value of available-for-sale investments by type of security was as follows:

 

 

December 31, 2022

 

 

 

Amortized Cost

 

 

Unrealized Gains

 

 

Unrealized Losses

 

 

Fair Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Investments:

 

 

 

 

 

 

 

 

 

 

 

 

    U.S. treasury bills

 

$

2,966

 

 

$

 

 

$

 

 

$

2,966

 

    Corporate Bonds and U.S. Government Agency Securities

 

 

62,368

 

 

 

14

 

 

 

(4

)

 

 

62,378

 

Total investments

 

$

65,334

 

 

$

14

 

 

$

(4

)

 

$

65,344

 

The Company held four debt securities that were in an unrealized loss position as of December 31, 2022. The aggregated fair value of debt securities in an unrealized loss position was $3.9 million. As of December 31, 2022, the Company did not hold debt securities in a continuous unrealized loss position for more than 12 months.

The Company reviews investments for other-than-temporary impairment whenever the fair value of an investment is less than the amortized cost and evidence indicates that an investment’s carrying amount is not recoverable within a reasonable period of time. Other-than-temporary impairments of investments are recognized in the consolidated statements of operations if we have the intent to sell the investment or if it is more likely than not that the Company will be required to sell the investment before recovery of the amortized cost basis. Evidence considered in this assessment includes reasons for the impairment, compliance with our investment policy, the severity and the duration of the impairment, and changes in value subsequent to the end of the period. The unrealized losses at December 31, 2022 are attributable to changes in interest rates, and we do not believe any unrealized losses represent other-than-temporary impairments.

As of December 31, 2021, the Company had no short-term investments.