Marketable Securities

6 Months Ended

Jun. 30, 2023

Investments, Debt and Equity Securities [Abstract]

Marketable securities

As of June 30, 2023, the Company had $93,768 of trading securities and $493,872 of available-for-sale securities (December 31, 2022 – $276,642 and $386,885, respectively). Amortized cost, unrealized losses recognized in accumulated other comprehensive loss and fair value of available-for-sale securities consisted of the following:


	June 30, 2023							December 31, 2022
	Amortized Cost		Unrealized Loss			Fair Value		Amortized Cost		Unrealized Loss			Fair Value
Contractual maturity of 0 to 1 years:
Guaranteed investment certificates	$	15,648	$	—		$	15,648	$	14,953	$	—		$	14,953
U.S. treasuries		202,358		(1,300	)		201,058		78,880		(837	)		78,043
U.S. government securities		50,207		(144	)		50,063		5,793		(20	)		5,773
Commercial paper		90,948		—			90,948		150,560		—			150,560
Corporate debt securities		23,607		(44	)		23,563		8,942		(68	)		8,874
Contractual maturity of 1 to 3 years:
U.S. treasuries		31,151		(220	)		30,931		60,354		(958	)		59,396
U.S. government securities		52,800		(506	)		52,294		26,741		(35	)		26,706
Corporate debt securities		29,462		(95	)		29,367		42,672		(92	)		42,580
Total	$	496,181	$	(2,309	)	$	493,872	$	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.