Investment securities

9 Months Ended

Sep. 30, 2022

Investment securities

Investment securities

4. Investment securities

The following represents the Company’s investment securities as of September 30, 2022 (in thousands):

		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

Accretion / (amortization) refers to the discounts and premiums incurred on bonds and notes purchased and are included within interest income on our consolidated income statement.

Accrued interest receivables related to the above investment securities amounted to $405 and are included within Other Receivables on our consolidated balance sheet.

Contractual maturities of investment securities as of September 30, 2022 are as follows (in thousands):

		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