Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2022

Investments Debt And Equity Securities [Abstract]

Details of Marketable Securities

Details of marketable securities held at December 31, 2022 and 2021 are as follows (in thousands):

					Cumulative
					Unrealized
	Fair Value		Basis		(Loss) Gain
IronNet:	December 31, 2022
198,750 common shares - unrestricted	$	46	$	4,273	$	(4,227	)
		46		4,273		(4,227	)
Equity fund and other securities		16,539		17,024		(485	)
	$	16,585	$	21,297	$	(4,712	)
IronNet:	December 31, 2021
1,250,000 common shares - restricted	$	4,734	$	26,501	$	(21,767	)
88,620 common shares - unrestricted		372		2,195		(1,823	)
Put options		1,245		489		756
		6,351		29,185		(22,834	)
Equity fund and other securities		9,806		9,805		1
	$	16,157	$	38,990	$	(22,833	)