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Note 5 - Equity Investments - Equity Method Investment Income (Losses) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Equity method investment income (loss), net |  | $ 1,111 | $ 0 | $ (531) | $ 0
MBI [Member] |  |  |  |  |
Equity method investment income (loss), net | [1] | (132) | 0 | (3,753) | 0
MBI [Member] | MBI Net Option [Member] |  |  |  |  |
MBI Net Option change in fair value |  | (25,600) | 0 | (41,390) | 0
Wisper [Member] |  |  |  |  |
Equity method investment income (loss), net |  | $ 1,243 | $ 0 | $ 3,222 | $ 0
[1] | The Company identified a $186.6 million difference between the fair values of certain of MBI’s finite-lived intangible assets and the respective carrying values recorded by MBI, of which $84.0 million was attributable to the Company’s 45% pro rata portion. The Company is amortizing its share on an accelerated basis over the lives of the respective assets. For the three months ended September 30, 2021, the Company recognized $3.8 million of its pro rata share of MBI’s net income and $4.0 million of its pro rata share of basis difference amortization. For the nine months ended September 30, 2021, the Company recognized $6.8 million of its pro rata share of MBI’s net income and $10.6 million of its pro rata share of basis difference amortization.

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