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Note 7 - Goodwill and Other Acquired Intangible Assets, Net - Schedule of Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Goodwill [Line Items] |  |  |  |  |  |  |
Impairment of goodwill | $ (4,828) | $ 0 | $ 0 | $ 0 | $ 0 | $ (4,828) | $ 0
Goodwill, Dispositions |  |  |  |  | (191,297) |  |
Accumulated Amortization, Goodwill, Dispositions |  |  |  |  | 191,297 |  |
Goodwill, Dispositions, Net |  |  |  |  | 0 |  |
Real Estate Segment |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Beginning Balance, Goodwill, Gross |  |  |  | 200,561 | 201,099 | 200,561 |
Beginning Balance, Accumulated Impairment Loss |  |  |  | (186,469) | (191,297) | (186,469) |
Beginning Balance, Goodwill, Net |  |  |  | $ 14,092 | 9,802 | 14,092 |
Goodwill, Acquired During Period |  |  |  |  |  | 538 |
Impairment of goodwill |  |  |  |  | 0 | (4,828) |
Ending Balance, Goodwill, Gross | 201,099 |  |  |  | 9,802 | 201,099 | 200,561
Ending Balance, Accumulated Impairment Loss | (191,297) |  |  |  | 0 | (191,297) | (186,469)
Beginning Balance, Goodwill, Net | $ 9,802 |  |  |  | $ 9,802 | $ 9,802 | $ 14,092

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