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Note 20 - Debt - Interest Expense (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
Interest expense, net | $ 1,951 | $ 1,952 | $ 3,081 | $ 2,605 | $ 2,255 | $ 1,536 | $ 1,939 | $ 1,854 | $ 9,589 | $ 7,584 | $ 8,487
Interest expense (income), net |  |  |  |  |  |  |  |  | 9,589 | 7,584 | 8,487
Interest expense (income), net |  |  |  |  |  |  |  |  | (9,589) | (7,584) | (8,487)
Junior Subordinated Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | 2,882 | 3,457 | 3,499
Senior Note 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | 496 |  |
Convertible Note 2017 [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | 1,505 | 1,472 | 1,445
Convertible 2013 Notes/ 2019 Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | 336 | 615 | 752
FT 2018/ 2019 FT Revolver [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense, net |  |  |  |  |  |  |  |  | 1,102 | 365 | 270
Redeemable Financial Instrument - DGC Family Fintech Trust / CBF [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense (income), net |  |  |  |  |  |  |  |  | 1,490 | 1,166 | 587
Interest expense (income), net |  |  |  |  |  |  |  |  | (1,490) | (1,166) | (587)
Redeemable Financial Instrument - JKD Capital Partners I LTD [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense (income), net |  |  |  |  |  |  |  |  | 1,883 | 699 | 1,968
Interest expense (income), net |  |  |  |  |  |  |  |  | (1,883) | (699) | (1,968)
Redeemable Financial Instrument - ViaNova Capital Group, LLC [Member] |  |  |  |  |  |  |  |  |  |  |
Interest expense (income), net |  |  |  |  |  |  |  |  | 105 | 190 | 34
Interest expense (income), net |  |  |  |  |  |  |  |  | $ (105) | $ (190) | $ (34)

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- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6036836-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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