Note 12 - Income Taxes - Net Operating Loss, Interest and Tax Credit Carryovers (Details) $ in Thousands  | 
 Dec. 31, 2020  
USD ($) 
 | 
|---|---|
| Net operating loss, amount | $ 75,341 | 
| Domestic Tax Authority [Member] | |
| Net operating loss, amount | 225,274 | 
| State and Local Jurisdiction [Member] | |
| Net operating loss, amount | $ 136,440 | 
| X | ||||||||||
- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Details 
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- Details 
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