Investments - Summary of Inputs Used in PWERM Approach of Investment (Detail) - Fair Value, Inputs, Level 3 [Member] - yr	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Securrency Inc [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conversion upon a future equity financing	33.30%
Redemption upon a corporate transaction	33.30%
Default	33.40%
Securrency Secured Convertible Note [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Default		20.00%
Conversion of note upon a future equity financing		50.00%
Redemption of note upon a corporate transaction		30.00%
Time to potential outcome (in years)		0.31
Securrency Convertible Note [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Default		20.00%	15.00%
Conversion of note upon a future equity financing		50.00%	60.00%
Redemption of note upon a corporate transaction		30.00%	25.00%
Time to potential outcome (in years)		0.31	0.33
Fnality Convertible Note [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Conversion of note upon a future financing round		95.00%	85.00%
Redemption of note upon a change of control		0.00%	10.00%
Default		5.00%	5.00%
Time to potential outcome (in years)		0.08	0.25