Note 13 - Stock-based Compensation and Similar Arrangements - Stock-based Compensation Included in Service Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Allocated Share-based Compensation Expense | $ 5,136 | $ 26,622 | $ 7,562 | ||
| Service Expense [Member] | |||||
| Allocated Share-based Compensation Expense | 830 | 21,480 | 4,019 | ||
| Service Expense [Member] | NET Services [Member] | |||||
| Allocated Share-based Compensation Expense | 841 | 724 | 587 | ||
| Service Expense [Member] | WD Services [Member] | |||||
| Allocated Share-based Compensation Expense | [1] | $ (11) | $ 20,756 | $ 3,432 | |
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