Note 21 - Equity (Tables)
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12 Months Ended |
Dec. 31, 2025 |
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| Notes Tables |
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| Schedule Of Unrestricted Common Stock And Restricted Common Stock Activity [Table Text Block] |
| | | Common Stock | | | Restricted Stock | | | Total | |
| December 31, 2022 | | | 1,433,283 | | | | 341,059 | | | | 1,774,342 | |
| Issuance as equity-based compensation | | | - | | | | 143,900 | | | | 143,900 | |
| Vesting of shares | | | 113,301 | | | | (113,301 | ) | | | - | |
| Shares withheld for employee taxes | | | (20,328 | ) | | | - | | | | (20,328 | ) |
| Forfeiture / cancellation of restricted stock | | | - | | | | (4,167 | ) | | | (4,167 | ) |
| December 31, 2023 | | | 1,526,256 | | | | 367,491 | | | | 1,893,747 | |
| Issuance of shares | | | 13,500 | | | | - | | | | 13,500 | |
| Issuance as equity-based compensation | | | - | | | | 153,125 | | | | 153,125 | |
| Vesting of shares | | | 114,491 | | | | (114,491 | ) | | | - | |
| Shares withheld for employee taxes | | | (26,195 | ) | | | - | | | | (26,195 | ) |
| Units exchanged for shares | | | 7,209 | | | | - | | | | 7,209 | |
| Forfeiture / cancellation of restricted stock | | | - | | | | (1,334 | ) | | | (1,334 | ) |
| December 31, 2024 | | | 1,635,261 | | | | 404,791 | | | | 2,040,052 | |
| Issuance as equity-based compensation | | | - | | | | 144,200 | | | | 144,200 | |
| Vesting of shares | | | 149,981 | | | | (149,981 | ) | | | - | |
| Shares withheld for employee taxes | | | (35,187 | ) | | | - | | | | (35,187 | ) |
| Forfeiture / cancellation of restricted stock | | | - | | | | (19,002 | ) | | | (19,002 | ) |
| December 31, 2025 | | | 1,750,055 | | | | 380,008 | | | | 2,130,063 | |
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| Units Received Pursuant To Agreement [Table Text Block] |
| | | Cohen & Company Inc. | | | Daniel G. Cohen | | | DGC Trust | | | Others | | | Total | |
| December 31, 2022 | | | 14,332,824 | | | | 19,356,855 | | | | 20,225,095 | | | | 72,098 | | | | 53,986,872 | |
| Issuance of Units under UIS Agreement, net | | | 929,730 | | | | - | | | | - | | | | - | | | | 929,730 | |
| Vesting of units | | | - | | | | 967,830 | | | | - | | | | 470,330 | | | | 1,438,160 | |
| Issuance of units under 2017 Convertible Note | | | - | | | | (479,380 | ) | | | - | | | | (470,330 | ) | | | (949,710 | ) |
| December 31, 2023 | | | 15,262,554 | | | | 19,845,305 | | | | 20,225,095 | | | | 72,098 | | | | 55,405,052 | |
| Issuance of Units under UIS Agreement, net | | | 1,090,048 | | | | - | | | | - | | | | - | | | | 1,090,048 | |
| Vesting of units | | | - | | | | 940,669 | | | | - | | | | 540,663 | | | | 1,481,332 | |
| Redemption of convertible non-controlling interest units | | | - | | | | (443,474 | ) | | | - | | | | (555,389 | ) | | | (998,863 | ) |
| December 31, 2024 | | | 16,352,602 | | | | 20,342,500 | | | | 20,225,095 | | | | 57,372 | | | | 56,977,569 | |
| Issuance of Units under UIS Agreement, net | | | 1,147,940 | | | | - | | | | - | | | | - | | | | 1,147,940 | |
| Vesting of units | | | - | | | | 1,011,000 | | | | - | | | | 610,996 | | | | 1,621,996 | |
| Redemption of convertible non-controlling interest units | | | - | | | | (460,679 | ) | | | - | | | | (502,053 | ) | | | (962,732 | ) |
| December 31, 2025 | | | 17,500,542 | | | | 20,892,821 | | | | 20,225,095 | | | | 166,315 | | | | 58,784,773 | |
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| Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] |
| | | For the Year Ended December 31, | |
| | | 2025 | | | 2024 | | | 2023 | |
| Net income / (loss) attributable to Cohen & Company Inc. | | $ | 14,431 | | | $ | (129 | ) | | $ | (5,113 | ) |
| Transfers (to) from the non-controlling interest: | | | | | | | | | | | | |
| Increase / (decrease) in Cohen & Company Inc.'s paid in capital for the acquisition / (surrender) of additional units in consolidated subsidiary, net | | | 590 | | | | 679 | | | | 636 | |
| Changes from net income / (loss) attributable to Cohen & Company Inc. and transfers (to) from non-controlling interest | | $ | 15,021 | | | $ | 550 | | | $ | (4,477 | ) |
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| Non-controlling Interest, Changes in Ownership Activity [Table Text Block] |
| | | Operating LLC | | | Columbus Circle SPAC | | | Other Consolidated Subsidiaries | | | Total | |
| December 31, 2022 | | $ | 47,270 | | | $ | - | | | $ | 17 | | | $ | 47,287 | |
| Non-controlling interest share of income | | | (4,078 | ) | | | - | | | | 19,590 | | | | 15,512 | |
| Other comprehensive income | | | 61 | | | | - | | | | - | | | | 61 | |
| Acquisition / (surrender) of additional units of consolidated subsidiary | | | (622 | ) | | | - | | | | - | | | | (622 | ) |
| Equity-based compensation | | | 3,184 | | | | - | | | | - | | | | 3,184 | |
| Shares withheld for employee taxes | | | (127 | ) | | | - | | | | - | | | | (127 | ) |
| Dividends/distributions to convertible non-controlling interest | | | (4,344 | ) | | | - | | | | - | | | | (4,344 | ) |
| Convertible non-controlling interest investment | | | (834 | ) | | | - | | | | - | | | | (834 | ) |
| Non-convertible non-controlling interest investment | | | - | | | | - | | | | 39 | | | | 39 | |
| Non-convertible non-controlling interest distributions | | | - | | | | - | | | | (10,041 | ) | | | (10,041 | ) |
| December 31, 2023 | | $ | 40,510 | | | $ | - | | | $ | 9,605 | | | $ | 50,115 | |
| Non-controlling interest share of income (loss) | | | (357 | ) | | | - | | | | 8,675 | | | | 8,318 | |
| Other comprehensive income | | | (119 | ) | | | - | | | | - | | | | (119 | ) |
| Acquisition / (surrender) of additional units of consolidated subsidiary | | | (664 | ) | | | - | | | | - | | | | (664 | ) |
| Equity-based compensation | | | 3,336 | | | | - | | | | - | | | | 3,336 | |
| Shares withheld for employee taxes | | | (135 | ) | | | - | | | | - | | | | (135 | ) |
| Dividends/distributions to convertible non-controlling interest | | | (4,819 | ) | | | - | | | | - | | | | (4,819 | ) |
| Redemption of convertible non-controlling interest units | | | (659 | ) | | | - | | | | - | | | | (659 | ) |
| Non-convertible non-controlling interest distributions | | | - | | | | - | | | | (6,818 | ) | | | (6,818 | ) |
| December 31, 2024 | | $ | 37,093 | | | $ | - | | | $ | 11,462 | | | $ | 48,555 | |
| Non-controlling interest share of income (loss) | | | 27,616 | | | | 5,853 | | | | (7,766 | ) | | | 25,703 | |
| Other comprehensive income | | | 254 | | | | - | | | | - | | | | 254 | |
| Acquisition / (surrender) of additional units of consolidated subsidiary | | | (576 | ) | | | - | | | | - | | | | (576 | ) |
| Equity-based compensation | | | 3,194 | | | | 15,671 | | | | - | | | | 18,865 | |
| Shares withheld for employee taxes | | | (241 | ) | | | - | | | | - | | | | (241 | ) |
| Dividends/distributions to convertible non-controlling interest | | | (14,818 | ) | | | - | | | | - | | | | (14,818 | ) |
| Redemption of convertible non-controlling interest units | | | (954 | ) | | | - | | | | - | | | | (954 | ) |
| Non-convertible non-controlling interest investment | | | - | | | | 2,669 | | | | - | | | | 2,669 | |
| Non-convertible non-controlling interest distributions | | | - | | | | (24,193 | ) | | | (3,258 | ) | | | (27,451 | ) |
| December 31, 2025 | | $ | 51,568 | | | $ | - | | | $ | 438 | | | $ | 52,006 | |
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