| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Net income | 3 | 11 | 52 | 61 | 80 | 26 | 27 | 37 | -10 | -36 | 50 | 51 | 103 | 67 |
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| Advisory fees received in gold and other precious metals | - | - | - | - | - | - | - | - | 50 | 62 | 75 | 57 | 49 | 53 |
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| Loss on extinguishment of debt (Note 10) | - | - | - | - | - | - | - | - | - | -2 | - | - | -10 | -31 |
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| Stock-based compensation | 7 | 7 | 6 | 8 | 11 | 15 | 15 | 13 | 12 | 12 | 10 | 10 | 16 | 21 |
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| (Gains)/losses on financial instruments owned, at fair value | - | - | - | - | - | - | - | - | - | - | - | - | - | 5 |
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| Imputed interest on payable to GBH | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 3 |
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| Amortization of issuance costs—convertible notes | - | - | - | - | - | - | - | - | - | 2 | 2 | 3 | 2 | 2 |
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| Depreciation and amortization | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 2 |
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| Amortization of right of use asset | - | - | - | - | - | - | - | - | - | - | - | 1 | 1 | 1 |
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| Losses on investments | - | - | - | - | - | - | - | - | - | - | - | - | - | -1 |
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| Total deferred | - | - | - | - | - | 13 | 9 | -6 | -0 | -2 | 0 | -1 | -0 | -0 |
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| Impairments | - | - | - | - | - | - | - | 17 | 31 | 23 | 16 | - | - | - |
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| Other | - | - | - | - | - | - | 0 | -1 | 0 | 1 | 0 | -0 | - | - |
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| Accounts receivable | 1 | 4 | 6 | 0 | 9 | -10 | 4 | -4 | 0 | 0 | 4 | 1 | 6 | 9 |
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| Prepaid expenses | - | - | - | - | - | 1 | 0 | -0 | -1 | 0 | 0 | 1 | 1 | 0 |
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| Gold and other precious metals | - | - | - | - | - | - | - | - | -36 | -45 | -57 | -42 | -42 | -53 |
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| Other assets | 1 | -0 | 0 | -0 | 2 | 0 | 0 | -1 | -0 | -0 | 0 | 0 | -0 | 0 |
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| Fund management and administration payable | - | - | - | - | - | - | - | - | -0 | -2 | 1 | 4 | 6 | 1 |
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| Compensation and benefits payable | 1 | -2 | 12 | -0 | 13 | -13 | 13 | -16 | 8 | -4 | 10 | 4 | 1 | 2 |
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| Income taxes payable | - | - | - | - | - | - | - | - | - | - | - | - | - | -3 |
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| Operating lease liabilities | - | - | - | - | - | - | - | - | - | - | - | - | - | -1 |
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| Accounts payable and other liabilities | 0 | 1 | 1 | -0 | 3 | -8 | 2 | -4 | 1 | 1 | -1 | -0 | 6 | 3 |
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| Net cash provided by operating activities | 14 | 11 | 70 | - | - | - | - | 37 | 47 | 29 | 75 | 55 | 86 | 113 |
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| Purchase of financial instruments owned, at fair value | - | - | - | - | - | - | - | - | - | - | - | 68 | 57 | 69 |
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| Cash paid—software development | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 2 |
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| Purchase of investments | 8 | 10 | 4 | 3 | 14 | 20 | 8 | - | - | - | - | - | - | 1 |
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| Purchase of fixed assets | 0 | 0 | 6 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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| Proceeds from the sale of financial instruments owned, at fair value | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 48 |
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| Proceeds from exiting investments | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
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| Proceeds from held-to-maturity securities maturing or called prior to maturity | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 0 |
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| Net cash (used in)/provided by investing activities | -1 | -2 | -7 | - | - | - | - | -182 | -7 | 28 | -100 | -38 | 82 | -24 |
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| Repurchase of Series A Preferred Stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 144 |
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| Repurchase and maturity of convertible notes | - | - | - | - | - | - | - | - | - | - | - | - | - | 133 |
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| Shares repurchased | 2 | 2 | 2 | 7 | 24 | 39 | 8 | 3 | 2 | 31 | 35 | 3 | 4 | 63 |
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| Dividends paid | - | - | - | 11 | 79 | 44 | 44 | 19 | 20 | 20 | 19 | 19 | 20 | 19 |
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| Cash paid to GBH | - | - | - | - | - | - | - | - | - | - | - | - | - | 15 |
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| Issuance costs—convertible notes | - | - | - | - | - | - | - | 9 | - | - | - | - | - | 8 |
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| Repurchase costs—Series A Preferred Stock | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 |
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| Proceeds from the issuance of convertible notes (Note 10) | - | - | - | - | - | - | - | - | - | - | - | - | - | 345 |
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| Repurchase of Series C Preferred Stock | - | - | - | - | - | - | - | - | - | - | - | - | -40 | - |
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| Net cash used in financing activities | -2 | 7 | -0 | - | - | - | - | 169 | -44 | -60 | 93 | -23 | -172 | -36 |
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| (Decrease)/increase in cash flow due to changes in foreign exchange rate | - | - | - | - | - | - | - | - | - | - | - | -3 | 1 | -2 |
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| Net increase/(decrease) in cash and cash equivalents | - | - | - | - | - | - | - | - | -3 | -2 | 67 | -9 | -3 | 52 |
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| Cash paid for income taxes | - | - | - | - | - | - | - | - | - | - | - | - | - | 32 |
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| Cash paid for interest | - | - | - | - | - | - | - | 6 | 8 | 7 | 10 | 12 | 11 | 12 |
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