Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of marketable securities

			Amortized		Unrealized
	Market value		cost basis		loss, net
	(In thousands)
December 31, 2022:
Current assets	$	33,147	$	33,164	$	(17)
March 31, 2023:
Current assets	$	42,963	$	43,023	$	(60)