Financial instruments and fair value measurements (Tables)

9 Months Ended

Sep. 30, 2022

Financial instruments and fair value measurements

Schedule of assets measured at fair value by level within the fair value hierarchy

	Level 1		Level 2		Level 3		Total
Cash equivalents	$	106,716		—		—	$	106,716
U.S. Treasury		90,016		—		—		90,016
Corporate bonds		—		193,920		—		193,920
Total	$	196,732	$	193,920	$	—	$	390,652

	Level 1		Level 2		Level 3		Total
Cash equivalents	$	52,882		—		—	$	52,882
U.S. Treasury		79,752		—		—		79,752
Corporate bonds		—		222,596		—		222,596
Total	$	132,634	$	222,596	$	—	$	355,230

Schedule of investments in fixed maturity securities

			Gross		Gross
			Unrealized		Unrealized
	Amortized Cost		Gains		Losses		Fair Value
U.S. Treasury	$	91,913	$	—	$	(1,897)	$	90,016
Corporate bonds		195,548		—		(1,628)		193,920
Total	$	287,461	$	—	$	(3,524)	$	283,936

			Gross		Gross
			Unrealized		Unrealized
	Amortized Cost		Gains		Losses		Fair Value
U.S. Treasury	$	80,052	$	—	$	(300)	$	79,752
Corporate bonds		222,898		—		(302)		222,596
Total	$	302,950	$	—	$	(602)	$	302,348

Schedule of maturities of fixed maturity available-for-sale securities

	September 30, 2022		December 31, 2021
Less than one year	$	244,509	$	166,434
One to five years		39,427		135,914
	$	283,936	$	302,348