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Investments - Details of Investments Carried at Cost (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Securrency Inc. - Series A Convertible Preferred Stock - Carrying Value [Member]
Investments	$ 8,488	$ 8,112
Securrency Inc. - Series A Convertible Preferred Stock - Cost [Member]
Investments	8,112	8,112
Securrency Inc. - Series B Convertible Preferred Stock - Carrying Value [Member]
Investments	5,500
Securrency Inc. - Series B Convertible Preferred Stock - Cost [Member]
Investments	5,500
Subtotal – Securrency, Inc. - Carrying Value [Member]
Investments	13,988	8,112
Subtotal – Securrency, Inc. - Cost [Member]
Investments	13,612	8,112
Investments - Carrying Value
Investments	14,238	8,112
Investments - Cost
Investments	13,862	$ 8,112
Onramp Invest, Simple Agreement for Future Equity - Carrying Value
Investments	250
Onramp Invest, Simple Agreement for Future Equity - Cost
Investments	$ 250

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- Definition

Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

+ References

No definition available.

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