Fair Value Measurements (Details) - Schedule of Assets and Liabilities Measured at Fair Value - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 |
Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | | | |
Recurring fair value measurements: | | | |
Cash equivalents | | $ 13,795 | 50,226 |
Financial instruments owned, at fair value: | | | |
Total | | 72,096 | 108,948 |
Fair Value, Recurring [Member] | Level 1 [Member] | | | |
Recurring fair value measurements: | | | |
Cash equivalents | | 13,795 | 50,226 |
Financial instruments owned, at fair value: | | | |
Total | | 55,962 | 92,752 |
Fair Value, Recurring [Member] | Level 2 [Member] | | | |
Recurring fair value measurements: | | | |
Cash equivalents | | | |
Financial instruments owned, at fair value: | | | |
Total | | 16,134 | 16,196 |
Fair Value, Recurring [Member] | Level 3 [Member] | | | |
Recurring fair value measurements: | | | |
Cash equivalents | | | |
Financial instruments owned, at fair value: | | | |
Total | | | |
Fair Value, Recurring [Member] | U.S. treasuries [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 5,261 | 5,007 |
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 2 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 5,261 | 5,007 |
Fair Value, Recurring [Member] | U.S. treasuries [Member] | Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | Equity Securities [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 7,095 | 6,337 |
Fair Value, Recurring [Member] | Equity Securities [Member] | Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 7,095 | 6,337 |
Fair Value, Recurring [Member] | Equity Securities [Member] | Level 2 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | Equity Securities [Member] | Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | Fixed Income Investments [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 1,939 | 1,957 |
Fair Value, Recurring [Member] | Fixed Income Investments [Member] | Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 1,014 | 1,008 |
Fair Value, Recurring [Member] | Fixed Income Investments [Member] | Level 2 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 925 | 949 |
Fair Value, Recurring [Member] | Fixed Income Investments [Member] | Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | ETFs [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 34,058 | 35,181 |
Fair Value, Recurring [Member] | ETFs [Member] | Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 34,058 | 35,181 |
Fair Value, Recurring [Member] | ETFs [Member] | Level 2 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | ETFs [Member] | Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 9,948 | 10,240 |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 1 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 2 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | 9,948 | 10,240 |
Fair Value, Recurring [Member] | Pass-through GSEs [Member] | Level 3 [Member] | | | |
Financial instruments owned, at fair value: | | | |
Financial instruments owned, at fair value | | | |
Fair Value, Nonrecurring [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | | | 9,684 |
Fair Value, Nonrecurring [Member] | Level 1 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | | | |
Fair Value, Nonrecurring [Member] | Level 2 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | | | |
Fair Value, Nonrecurring [Member] | Level 3 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | | | 9,684 |
Fnality International Limited—B-One Preference Shares [Member] | Fair Value, Nonrecurring [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [1] | | 9,684 |
Fnality International Limited—B-One Preference Shares [Member] | Fair Value, Nonrecurring [Member] | Level 1 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [1] | | |
Fnality International Limited—B-One Preference Shares [Member] | Fair Value, Nonrecurring [Member] | Level 2 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [1] | | |
Fnality International Limited—B-One Preference Shares [Member] | Fair Value, Nonrecurring [Member] | Level 3 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [1] | | 9,684 |
Other Investments [Member] | Fair Value, Nonrecurring [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [2] | | |
Other Investments [Member] | Fair Value, Nonrecurring [Member] | Level 1 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [2] | | |
Other Investments [Member] | Fair Value, Nonrecurring [Member] | Level 2 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [2] | | |
Other Investments [Member] | Fair Value, Nonrecurring [Member] | Level 3 [Member] | | | |
Non-recurring fair value measurements: | | | |
Non-recurring fair value measurements | [2] | | |
| |
[1]Fair value determined on October 31, 2023[2]Fair value determined on September 30, 2023 | |