| Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
| | | Three Months Ended June 30, | | | Six Months Ended June 30, | |
| | | 2026 | | | 2025 | | | 2026 | | | 2025 | |
| Net income / (loss) attributable to Cohen & Company Inc. | | $ | 3,574 | | | $ | 1,408 | | | $ | 5,066 | | | $ | 1,737 | |
| Add: Net income (loss) attributable to the convertible non-controlling interest of Cohen & Company Inc. (1) | | | 6,403 | | | | 3,361 | | | | 9,082 | | | | 4,143 | |
| Add / (deduct): Adjustment (2) | | | (4,134 | ) | | | 7 | | | | (5,726 | ) | | | 10 | |
| Net income / (loss) on a fully converted basis | | $ | 5,843 | | | $ | 4,776 | | | $ | 8,422 | | | $ | 5,890 | |
| | | | | | | | | | | | | | | | | |
| Weighted average common shares outstanding - Basic | | | 2,260,310 | | | | 1,740,307 | | | | 2,042,252 | | | | 1,722,409 | |
| Unrestricted LLC Units exchangeable into Cohen & Company Inc. shares (1) | | | 3,884,196 | | | | 4,128,423 | | | | 4,028,197 | | | | 4,117,435 | |
| Restricted units or shares | | | 102,106 | | | | 44,023 | | | | 105,118 | | | | 43,243 | |
| Weighted average common shares outstanding - Diluted (3) | | | 6,246,612 | | | | 5,912,753 | | | | 6,175,567 | | | | 5,883,087 | |
| | | | | | | | | | | | | | | | | |
| Net income / (loss) per common share - Basic | | $ | 1.58 | | | $ | 0.81 | | | $ | 2.48 | | | $ | 1.01 | |
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| Net income / (loss) per common share - Diluted | | $ | 0.94 | | | $ | 0.81 | | | $ | 1.36 | | | $ | 1.00 | |
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