Marketable Securities - Additional Information (Details) - USD ($)		3 Months Ended	12 Months Ended
	May 05, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Oct. 01, 2021	Sep. 14, 2021
Marketable Securities [Line Items]
Realized loss on marketable securities			$ (22,649,000)	$ (16,962,000)
Unrealized gain (loss) on marketable securities			$ 18,121,000	$ (22,949,000)
IronNet [Member] | Private Warrants [Member]
Marketable Securities [Line Items]
Class Of Warrant Or Right Exercised					2,065,000
IronNet [Member] | Common Stock [Member]
Marketable Securities [Line Items]
Common Shares Received Upon Exercise Of Warrants					1,271,406
Shares sold				1,455,315
Pre-tax proceeds from shares sold				$ 18,548,000
Unrestricted shares held			198,750	88,620
Restricted shares held				1,250,000
IronNet [Member] | Private Warrants [Member]
Marketable Securities [Line Items]
Distribution of shares by sponsor			2,065,000
IronNet [Member] | Private Warrants [Member] | LGL Systems Acquisition Holdings Company, LLC [Member]
Marketable Securities [Line Items]
Distribution of shares by sponsor						2,065,000
IronNet [Member] | Common Stock [Member]
Marketable Securities [Line Items]
Distribution of shares by sponsor			1,250,000
Distribution of shares by sponsor after charitable contribution			50,000
Fair value of shares recognized, expense			$ 1,318,000
IronNet [Member] | Common Stock [Member] | LGL Systems Acquisition Holdings Company, LLC [Member]
Marketable Securities [Line Items]
Distribution of shares by sponsor						1,572,529
IronNet [Member] | PIPE Related Common Shares [Member]
Marketable Securities [Line Items]
Distribution of shares by sponsor			272,529
IronNet [Member] | Put Options [Member]
Marketable Securities [Line Items]
Unrealized gain (loss) on marketable securities				$ 756,000
IronNet [Member] | Put Options [Member] | IronNet [Member]
Marketable Securities [Line Items]
Common stock, delivery of shares		50,000
IronNet [Member] | Put Options [Member] | Common Stock [Member]
Marketable Securities [Line Items]
Shares issued by sponsor				300,000
IronNet [Member] | Put Options [Member] | Common Stock [Member] | IronNet [Member]
Marketable Securities [Line Items]
Shares sold	250,000
Shares sold value	$ 1,263,000