INVESTMENT SECURITIES (Tables)

6 Months Ended

Jun. 30, 2023

INVESTMENT SECURITIES

Schedule of investment securities

The following tables summarize our investment securities at June 30, 2023 and December 31, 2022:

	June 30, 2023
	Amortized		Gross		Gross
	cost, as		unrealized		unrealized		Estimated
(in thousands)	adjusted		holding gains		holding losses		fair value
Short-term investments:
Obligations of domestic governmental agencies (maturing between July 2023 and February 2024) (held-to-maturity)	$	47,896	$	—	$	579	$	47,317
Total short-term investment securities	$	47,896	$	—	$	579	$	47,317
	December 31, 2022
	Amortized		Gross		Gross
	cost, as		unrealized		unrealized		Estimated fair
	adjusted		holding gains		holding losses		value
Short-term investments:
Obligations of domestic governmental agencies (maturing between January 2023 and December 2023) (held-to-maturity)	$	59,374	$	—	$	1,053	$	58,321
Long-term investments:
Obligations of domestic governmental agencies (maturing between January 2024 and February 2024) (held-to-maturity)		12,404		—		429		11,975
Total short-term and long-term investment securities	$	71,778	$	—	$	1,482	$	70,296