Fair Value Measurements - Additional Information (Details)	Dec. 31, 2021 USD ($) MutualFund shares	Dec. 31, 2020 USD ($) MutualFund
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Number of mutual fund investment | MutualFund	4	2
Warrant	2,065,000
IronNet [Member] | Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Unrestricted shares held	88,620
IronNet [Member] | Common Stock [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Distribution of shares by sponsor subject to certain founder share restrictions	1,300,000
IronNet [Member] | Common Stock [Member] | Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Distribution of shares by sponsor subject to certain founder share restrictions	1,250,000
Non-Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Other liabilities, fair value disclosure, non-recurring | $	$ 0	$ 0