Investment securities (Tables)

9 Months Ended

Sep. 30, 2022

Investment securities

Schedule of company's investment securities

		Acquisition Cost		Accretion / (Amortization)		Unrealized Gain / (Loss)		Estimated Fair Value
Commercial paper	$	51,059	$	332	$	(172)	$	51,219
Corporate notes / bonds		39,168		82		(547)		38,703
Debt security		1,000		-		-		1,000
Money market funds		2,020		-		-		2,020
U.S. govt. agencies		34,118		4		(178)		33,944
U.S. treasuries		24,773		58		(134)		24,697
Total investment securities	$	152,138	$	476	$	(1,031)	$	151,583

Schedule of contractual maturities of investment securities

		Acquisition Cost		Estimated Fair Value
Original maturities of 90 days or less	$	38,111	$	38,186
Original maturities of 91-365 days		74,249		74,200
Original maturities of 366+ days		39,778		39,197
Total investment securities	$	152,138	$	151,583