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Marketable Securities
 12 Months Ended
Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Marketable Securities
7.
Marketable securities;

As of December 31, 2022, the Company had $276,642 of trading securities and $386,885 of available-for-sale securities (December 31, 2021 – $376,086 and nil, respectively). Amortized cost, unrealized losses recognized in accumulated other comprehensive loss and fair value of available-for-sale securities consisted of the following:

 

 

 

December 31, 2022

 

 

 

Amortized
Cost

 

 

Unrealized
Loss

 

 

Fair
Value

 

Contractual maturity of 0 to 1 years:

 

 

 

 

 

 

 

 

 

Guaranteed investment certificates

 

$

14,953

 

 

$

—

 

 

$

14,953

 

U.S. treasuries

 

 

78,880

 

 

 

(837

)

 

 

78,043

 

U.S. government securities

 

 

5,793

 

 

 

(20

)

 

 

5,773

 

Commercial paper

 

 

150,560

 

 

 

—

 

 

 

150,560

 

Corporate debt securities

 

 

8,942

 

 

 

(68

)

 

 

8,874

 

Contractual maturity of 1 to 3 years:

 

 

 

 

 

 

 

 

 

U.S. treasuries

 

 

60,354

 

 

 

(958

)

 

 

59,396

 

U.S. government securities

 

 

26,741

 

 

 

(35

)

 

 

26,706

 

Corporate debt securities

 

 

42,672

 

 

 

(92

)

 

 

42,580

 

Total

 

$

388,895

 

 

$

(2,010

)

 

$

386,885

 

Allowance for credit losses or impairment on these marketable securities have not been recognized as these securities are high credit quality, investment grade securities that the Company does not intend to sell and will not be required to sell prior to their anticipated recovery, and the decline in fair value is primarily due to changes in interest rates.