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Note 29 - Segment and Geographic Information - Statements of Operations Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net trading |  |  |  |  |  |  |  |  |  | $ 73,611 | $ 38,172 | $ 29,298
Principal transactions and other income |  |  |  |  |  |  |  |  |  | 45,506 | 2,103 | 4,573
Revenues, Total |  | $ 66,365 | $ 21,856 | $ 24,119 | $ 17,770 | $ 16,090 | $ 11,267 | $ 11,169 | $ 11,140 | 130,110 | 49,666 | 49,386
Compensation and benefits |  | 23,479 | 10,965 | 11,324 | 14,134 | 6,159 | 7,017 | 6,432 | 6,364 | 59,902 | 25,972 | 25,385
Other operating expense |  |  |  |  |  |  |  |  |  | 19,997 | 19,653 | 20,342
Goodwill, Impairment Loss |  |  |  |  | 7,883 |  |  |  |  | 7,883 |  |
Total operating expenses |  | 28,590 | 15,784 | 16,193 | 27,215 | 12,056 | 11,710 | 10,651 | 11,208 | 87,782 | 45,625 | 45,727
Operating income / (loss) |  | 37,775 | 6,072 | 7,926 | (9,445) | 4,034 | (443) | 518 | (68) | 42,328 | 4,041 | 3,659
Interest expense (income), net |  |  |  |  |  |  |  |  |  | (9,589) | (7,584) | (8,487)
Earnings / (loss) realized |  | (244) | (1,371) | (1,233) | (107) | (188) | (109) | (248) | (8) | (2,955) | (553) |
Income / (loss) before income taxes |  | 35,580 | 2,749 | 3,612 | (12,157) | 1,591 | (2,088) | (1,669) | (1,930) | 29,784 | (4,096) | (4,828)
Income tax expense / (benefit) |  | (8,046) | (594) | 343 | (372) | 394 | (170) | (641) | (106) | (8,669) | (523) | (841)
Net income / (loss) |  | 43,626 | 3,343 | 3,269 | (11,785) | 1,197 | (1,918) | (1,028) | (1,824) | 38,453 | (3,573) | (3,987)
Less: Net income / (loss) attributable to the non-controlling interest |  |  |  |  |  |  |  |  |  | 24,248 | (1,519) | (1,524)
Net income / (loss) attributable to Cohen & Company Inc. |  | 14,751 | 1,655 | 901 | (3,102) | 774 | (1,216) | (410) | (1,202) | 14,205 | (2,054) | (2,463)
Depreciation, Depletion and Amortization, Nonproduction, Total |  | 85 | 85 | 84 | 80 | 79 | 80 | 78 | 81 | 334 | 318 | 261
Compensation and benefits |  | 23,479 | 10,965 | 11,324 | 14,134 | 6,159 | 7,017 | 6,432 | 6,364 | 59,902 | 25,972 | 25,385
Other Operating Expense |  |  |  |  |  |  |  |  |  | 19,997 | 19,653 | 20,342
Impairment of goodwill |  |  |  |  | $ 7,883 |  |  |  |  | 7,883 |  |
Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 8,759 | 7,560 | 12,536
New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 2,234 | 1,831 | 2,979
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net trading |  |  |  |  |  |  |  |  |  | 73,611 | 38,172 | 29,298
Principal transactions and other income |  |  |  |  |  |  |  |  |  | 45,506 | 2,103 | 4,573
Revenues, Total |  |  |  |  |  |  |  |  |  | 130,110 | 49,666 | 49,386
Compensation and benefits |  |  |  |  |  |  |  |  |  | 53,101 | 23,380 | 22,431
Other operating expense |  |  |  |  |  |  |  |  |  | 14,756 | 15,112 | 16,601
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 7,883 |  |
Total operating expenses |  |  |  |  |  |  |  |  |  | 75,740 | 38,492 | 39,032
Operating income / (loss) |  |  |  |  |  |  |  |  |  | 54,370 | 11,174 | 10,354
Interest expense (income), net |  |  |  |  |  |  |  |  |  | (997) | (175) | (236)
Earnings / (loss) realized |  |  |  |  |  |  |  |  |  | (2,955) | (553) |
Income / (loss) before income taxes |  |  |  |  |  |  |  |  |  | 50,418 | 10,446 | 10,118
Income tax expense / (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Net income / (loss) |  |  |  |  |  |  |  |  |  | 50,418 | 10,446 | 10,118
Less: Net income / (loss) attributable to the non-controlling interest |  |  |  |  |  |  |  |  |  | 10,048 | (288) |
Net income / (loss) attributable to Cohen & Company Inc. |  |  |  |  |  |  |  |  |  | 40,370 | 10,734 | 10,118
Depreciation, Depletion and Amortization, Nonproduction, Total |  |  |  |  |  |  |  |  |  | 21 | 21 | 52
Compensation and benefits |  |  |  |  |  |  |  |  |  | 53,101 | 23,380 | 22,431
Other Operating Expense |  |  |  |  |  |  |  |  |  | 14,756 | 15,112 | 16,601
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 7,883 |  |
Operating Segments [Member] | Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 8,759 | 7,560 | 12,536
Operating Segments [Member] | New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 2,234 | 1,831 | 2,979
Operating Segments [Member] | Capital Markets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net trading |  |  |  |  |  |  |  |  |  | 73,611 | 38,172 | 29,298
Principal transactions and other income |  |  |  |  |  |  |  |  |  | 3 | 1 | 39
Revenues, Total |  |  |  |  |  |  |  |  |  | 75,848 | 40,004 | 32,316
Compensation and benefits |  |  |  |  |  |  |  |  |  | 36,092 | 18,575 | 17,539
Other operating expense |  |  |  |  |  |  |  |  |  | 12,546 | 12,257 | 12,410
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  | 7,883 |  |
Total operating expenses |  |  |  |  |  |  |  |  |  | 56,521 | 30,832 | 29,949
Operating income / (loss) |  |  |  |  |  |  |  |  |  | 19,327 | 9,172 | 2,367
Interest expense (income), net |  |  |  |  |  |  |  |  |  | (997) | (175) | (236)
Earnings / (loss) realized |  |  |  |  |  |  |  |  |  |  |  |
Income / (loss) before income taxes |  |  |  |  |  |  |  |  |  | 18,330 | 8,997 | 2,131
Income tax expense / (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Net income / (loss) |  |  |  |  |  |  |  |  |  | 18,330 | 8,997 | 2,131
Less: Net income / (loss) attributable to the non-controlling interest |  |  |  |  |  |  |  |  |  |  |  |
Net income / (loss) attributable to Cohen & Company Inc. |  |  |  |  |  |  |  |  |  | 18,330 | 8,997 | 2,131
Depreciation, Depletion and Amortization, Nonproduction, Total |  |  |  |  |  |  |  |  |  | 18 | 18 | 48
Compensation and benefits |  |  |  |  |  |  |  |  |  | 36,092 | 18,575 | 17,539
Other Operating Expense |  |  |  |  |  |  |  |  |  | 12,546 | 12,257 | 12,410
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 7,883 |  |
Operating Segments [Member] | Capital Markets [Member] | Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments [Member] | Capital Markets [Member] | New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 2,234 | 1,831 | 2,979
Operating Segments [Member] | Asset Management Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net trading |  |  |  |  |  |  |  |  |  |  |  |
Principal transactions and other income |  |  |  |  |  |  |  |  |  | 639 | 530 | 678
Revenues, Total |  |  |  |  |  |  |  |  |  | 9,398 | 8,090 | 13,214
Compensation and benefits |  |  |  |  |  |  |  |  |  | 5,309 | 4,805 | 4,571
Other operating expense |  |  |  |  |  |  |  |  |  | 2,042 | 2,456 | 3,800
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |
Total operating expenses |  |  |  |  |  |  |  |  |  | 7,351 | 7,261 | 8,371
Operating income / (loss) |  |  |  |  |  |  |  |  |  | 2,047 | 829 | 4,843
Interest expense (income), net |  |  |  |  |  |  |  |  |  |  |  |
Earnings / (loss) realized |  |  |  |  |  |  |  |  |  | 639 |  |
Income / (loss) before income taxes |  |  |  |  |  |  |  |  |  | 2,686 | 829 | 4,843
Income tax expense / (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Net income / (loss) |  |  |  |  |  |  |  |  |  | 2,686 | 829 | 4,843
Less: Net income / (loss) attributable to the non-controlling interest |  |  |  |  |  |  |  |  |  | 1,408 |  |
Net income / (loss) attributable to Cohen & Company Inc. |  |  |  |  |  |  |  |  |  | 1,278 | 829 | 4,843
Depreciation, Depletion and Amortization, Nonproduction, Total |  |  |  |  |  |  |  |  |  | 3 | 3 | 4
Compensation and benefits |  |  |  |  |  |  |  |  |  | 5,309 | 4,805 | 4,571
Other Operating Expense |  |  |  |  |  |  |  |  |  | 2,042 | 2,456 | 3,800
Impairment of goodwill |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments [Member] | Asset Management Segment [Member] | Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  | 8,759 | 7,560 | 12,536
Operating Segments [Member] | Asset Management Segment [Member] | New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments [Member] | Principal Investing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net trading |  |  |  |  |  |  |  |  |  |  |  |
Principal transactions and other income |  |  |  |  |  |  |  |  |  | 44,864 | 1,572 | 3,856
Revenues, Total |  |  |  |  |  |  |  |  |  | 44,864 | 1,572 | 3,856
Compensation and benefits |  |  |  |  |  |  |  |  |  | 11,700 |  | 321
Other operating expense |  |  |  |  |  |  |  |  |  | 168 | 399 | 391
Goodwill, Impairment Loss |  |  |  |  |  |  |  |  |  |  |  |
Total operating expenses |  |  |  |  |  |  |  |  |  | 11,868 | 399 | 712
Operating income / (loss) |  |  |  |  |  |  |  |  |  | 32,996 | 1,173 | 3,144
Interest expense (income), net |  |  |  |  |  |  |  |  |  |  |  |
Earnings / (loss) realized |  |  |  |  |  |  |  |  |  | (3,594) | (553) |
Income / (loss) before income taxes |  |  |  |  |  |  |  |  |  | 29,402 | 620 | 3,144
Income tax expense / (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Net income / (loss) |  |  |  |  |  |  |  |  |  | 29,402 | 620 | 3,144
Less: Net income / (loss) attributable to the non-controlling interest |  |  |  |  |  |  |  |  |  | 8,640 | (288) |
Net income / (loss) attributable to Cohen & Company Inc. |  |  |  |  |  |  |  |  |  | 20,762 | 908 | 3,144
Depreciation, Depletion and Amortization, Nonproduction, Total |  |  |  |  |  |  |  |  |  |  |  |
Compensation and benefits |  |  |  |  |  |  |  |  |  | 11,700 |  | 321
Other Operating Expense |  |  |  |  |  |  |  |  |  | 168 | 399 | 391
Impairment of goodwill |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments [Member] | Principal Investing [Member] | Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  |  |  |
Operating Segments [Member] | Principal Investing [Member] | New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  |  |  |  |  |  |  |
Segment Reconciling Items [Member] |  |  |  |  |  |  |  |  |  |  |  |
Net trading | [1] |  |  |  |  |  |  |  |  |  |  |
Principal transactions and other income | [1] |  |  |  |  |  |  |  |  |  |  |
Revenues, Total | [1] |  |  |  |  |  |  |  |  |  |  |
Compensation and benefits | [1] |  |  |  |  |  |  |  |  | 6,801 | 2,592 | 2,954
Other operating expense | [1] |  |  |  |  |  |  |  |  | 5,241 | 4,541 | 3,741
Goodwill, Impairment Loss | [1] |  |  |  |  |  |  |  |  |  |  |
Total operating expenses | [1] |  |  |  |  |  |  |  |  | 12,042 | 7,133 | 6,695
Operating income / (loss) | [1] |  |  |  |  |  |  |  |  | (12,042) | (7,133) | (6,695)
Interest expense (income), net | [1] |  |  |  |  |  |  |  |  | (8,592) | (7,409) | (8,251)
Earnings / (loss) realized | [1] |  |  |  |  |  |  |  |  |  |  |
Income / (loss) before income taxes | [1] |  |  |  |  |  |  |  |  | (20,634) | (14,542) | (14,946)
Income tax expense / (benefit) | [1] |  |  |  |  |  |  |  |  | (8,669) | (523) | (841)
Net income / (loss) | [1] |  |  |  |  |  |  |  |  | (11,965) | (14,019) | (14,105)
Less: Net income / (loss) attributable to the non-controlling interest | [1] |  |  |  |  |  |  |  |  | 14,200 | (1,231) | (1,524)
Net income / (loss) attributable to Cohen & Company Inc. | [1] |  |  |  |  |  |  |  |  | (26,165) | (12,788) | (12,581)
Depreciation, Depletion and Amortization, Nonproduction, Total | [1] |  |  |  |  |  |  |  |  | 313 | 297 | 209
Compensation and benefits | [1] |  |  |  |  |  |  |  |  | 6,801 | 2,592 | 2,954
Other Operating Expense | [1] |  |  |  |  |  |  |  |  | 5,241 | 4,541 | 3,741
Impairment of goodwill | [1] |  |  |  |  |  |  |  |  |  |  |
Segment Reconciling Items [Member] | Asset Management [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total | [1] |  |  |  |  |  |  |  |  |  |  |
Segment Reconciling Items [Member] | New Issue and Advisory [Member] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total | [1] |  |  |  |  |  |  |  |  |  |  |
[1] | Unallocated includes certain expenses incurred by indirect overhead and support departments (such as the executive, finance, legal, information technology, human resources, risk, compliance and other similar overhead and support departments). Some of the items not allocated include: (1) operating expenses (such as cash compensation and benefits, equity-based compensation expense, professional fees, travel and entertainment, consulting fees, and rent) related to support departments excluding certain departments that directly support the Capital Markets business segment; (2) interest expense on debt; and (3) income taxes. Management does not consider these items necessary for an understanding of the operating results of these business segments and such amounts are excluded in business segment reporting to the chief operating decision maker.

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