Investments in Equity Securities - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended				9 Months Ended		12 Months Ended
	Jun. 20, 2023	Sep. 15, 2022	Apr. 27, 2022	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]
Debt conversion, converted instrument, shares issued (in shares)				18,144,158		1,547,234
Common stock, par value (in usd per share)				$ 0.001				$ 0.001		$ 0.001
Gain on conversion of note receivable								$ 0	$ 791
Unrealized gain (loss) on equity securities				$ 5,791			$ (5,854)	5,733	(7,110)
Sales of equity securities								323	229
Realized loss on sale of equity securities				$ 6,692			$ 151	$ 6,692	$ 151
Common Stock
Debt and Equity Securities, FV-NI [Line Items]
Debt conversion, converted instrument, shares issued (in shares)				18,144,158	7,349,420	1,547,234	111,585
FOXO Technologies Inc.
Debt and Equity Securities, FV-NI [Line Items]
Equity securities, number of shares sold (in shares)							0	2,800,000	0
Sales of equity securities								$ 300
Realized loss on sale of equity securities				$ 6,700				6,700
FOXO Technologies Inc. | Level 1
Debt and Equity Securities, FV-NI [Line Items]
Unrealized gain (loss) on equity securities				$ 5,800			$ (5,900)	5,700	$ (7,100)
FOXO Technologies Inc. | Common Class A
Debt and Equity Securities, FV-NI [Line Items]
Debt conversion, converted instrument, shares issued (in shares)	0.67	891,124
Common stock, par value (in usd per share)	$ 1.00	$ 0.0001
Gain on conversion of note receivable								$ 1,100		$ 800
Conversion of stock, shares issued (in shares)	3,685,000
FOXO Technologies Inc. | Convertible Notes
Debt and Equity Securities, FV-NI [Line Items]
Debt securities, available-for-sale, discount, percentage			10.00%
Investments in debt securities			$ 6,100
Payments to acquire debt securities, available-for-sale			$ 5,500
Debt securities, available-for-sale, interest rate	10.00%		12.00%
Debt securities, available-for-sale, term			12 months
Debt securities, available-for-sale, extension option term			3 months
Debt securities, available-for-sale, conversion term			270 days
FOXO Technologies Inc. | Common Stock
Debt and Equity Securities, FV-NI [Line Items]
Number of shares sold under offering (in shares)								1,700,000		800,000
Sysorex | Common Stock
Debt and Equity Securities, FV-NI [Line Items]
Number of shares sold under offering (in shares)								13,000,000		13,000,000
Number of common shares acquired (in shares)				3,000,000				3,000,000		3,000,000