Segment Reporting - Segment Expense (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Crypto costs	$ 396,815			$ 312,841			$ 2,012,524	$ 1,636,514
Execution, clearing and brokerage fees	3,965			2,207			15,797	11,229
Operating income (loss) from continuing operations	(25,263)			(25,137)			(56,819)	(72,593)
Net loss	(23,156)	$ (30,152)	$ 16,239	(6,291)	$ (35,512)	$ (21,275)	(37,069)	(63,078)
Reportable Segment
Segment Reporting Information [Line Items]
Total revenues and gains from operations	402,211			316,333			2,036,070	1,654,814
Personnel	5,383			7,806			14,703	26,220
Non-cash compensation	7,782			2,324			16,639	12,226
Professional services	7,364			5,282			16,562	12,040
Technology	1,864			2,125			5,052	7,203
Occupancy	584			697			1,186	2,146
Marketing and promotions	123			1,180			327	2,323
Business insurance	1,183			4,286			4,009	11,189
Depreciation and amortization	153			107			527	282
Other operating costs	2,258			2,614			5,563	6,035
Crypto costs	396,815			312,841			2,012,524	1,636,514
Execution, clearing and brokerage fees	3,965			2,208			15,797	11,229
Total operating expenses	427,474			341,470			2,092,889	1,727,407
Operating income (loss) from continuing operations	(25,263)			(25,137)			(56,819)	(72,593)
Other expense (income), net	(3,709)			(21,374)			(27,761)	(17,922)
Net loss	$ (21,554)			$ (3,763)			$ (29,058)	$ (54,671)