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Investments (Details) £ in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Investments (Details) £ in Thousands, $ in Thousands	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Feb. 28, 2023 USD ($)	Feb. 28, 2023 GBP (£)
Investments [Line Items]
Other losses, net		$ 1,777
Percentage of outstanding convertible note		75
Percentage Of Voting Approval Required To Redeem All Of The Outstanding Notes At Maturity		50.00%
Percentage of voting approval required to redeem all of the outstanding notes before maturity		75.00%
Unrealized gain (loss) on investments		$ (1,006)	$ (15,633)
Investment in Securrency, Inc [Member]
Investments [Line Items]
Net impairment charge	$ 2,391	$ 7,291
Fnality International Limited [Member]
Investments [Line Items]
Ownership interest percentage	5.00%	5.00%
Maturity date (unless earlier converted, repurchased or redeemed)		Dec. 31, 2023
Percentage of discount on future equity financing for preferred stock	20.00%	20.00%
Unrealized gain (loss) on investments	$ (426)	$ 532
Fnality International Limited [Member] \| Accounting Standard Update 201601 [Member]
Investments [Line Items]
Fair value				$ (6,863)	£ 5,000
Securrency Inc [Member]
Investments [Line Items]
Recognized an impairment on other investments	$ 312	$ 312