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Fair value of financial instruments and marketable securities - Marketable Securities (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2020	Mar. 31, 2025	Mar. 31, 2024
Changes in fair value
Unrealized Gain/(Loss)		$ 774	$ 710
Investments Purchased		5,209	9,065
Redemptions/Sale		(8,896)	(1,207)
Unrealized Gain/(Loss)		(3,122)	9
Unrealized Gain/(Loss)			166
Beginning Balance - Total		42,793	41,261
Unrealized Gain/(Loss) - Total		(2,348)	885
Foreign Currency Unrealized Gain/(Loss) - Total		2,066	(823)
Investments Purchased - Total		5,209	9,065
Redemptions/Sale - Total		(8,896)	(1,207)
Ending Balance - Total		38,824	49,181
ClearPoint Convertible note
Purchase of convertible note		322,335	104,373
Marketable securities - equity investments
Changes in fair value
Beginning Balance		29,034	22,634
Unrealized Gain/(Loss)		774	710
Foreign Currency Unrealized Gain/(Loss)		2,066	(823)
Investments Purchased		5,209	9,065
Redemptions/Sale		(8,896)	(1,207)
Ending Balance		28,187	30,379
ClearPoint Equity Investment
Changes in fair value
Beginning Balance		13,759	6,074
Unrealized Gain/(Loss)		(3,122)	9
Ending Balance		10,637	6,083
ClearPoint convertible debt
Changes in fair value
Beginning Balance			12,553
Unrealized Gain/(Loss)			166
Ending Balance		$ 0	$ 12,719
ClearPoint Convertible note
Purchase of convertible note	$ 10,000
Conversion price - convertible note	$ 6
Term of convertible note	5 years

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