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Marketable Securities
 9 Months Ended
Sep. 30, 2022
Investments Debt And Equity Securities [Abstract]  
Marketable Securities
6.
Marketable securities

As of September 30, 2022, the Company had $355,543 of trading securities and $293,142 of available-for-sale securities (December 31, 2021 – $376,086 and nil, respectively). Amortized cost, unrealized losses recognized in accumulated other comprehensive income (loss) and fair value of available-for-sale securities consisted of the following:

 

 

 

September 30, 2022

 

 

 

Amortized
Cost

 

 

Unrealized
Loss

 

 

Fair
Value

 

Contractual maturity of 0 to 1 years:

 

 

 

 

 

 

 

 

 

Guaranteed investment certificates

 

$

14,491

 

 

$

—

 

 

$

14,491

 

U.S. government securities

 

 

53,875

 

 

 

(465

)

 

 

53,410

 

Commercial paper

 

 

102,465

 

 

 

—

 

 

 

102,465

 

Corporate debt securities

 

 

8,866

 

 

 

(79

)

 

 

8,787

 

Contractual maturity of 1 to 3 years:

 

 

 

 

 

 

 

 

 

U.S. government securities

 

 

72,775

 

 

 

(1,225

)

 

 

71,550

 

Corporate debt securities

 

 

42,635

 

 

 

(196

)

 

 

42,439

 

Total

 

$

295,107

 

 

$

(1,965

)

 

$

293,142

 

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.