Note 17 - Retirement Plan (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| NET Services [Member] | |||
| Defined Contribution Plan Employers Matching Contribution Vesting Period | 5 years | ||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 248 | $ 221 | $ 180 |
| WD Services [Member] | |||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 9,139 | $ 10,331 | $ 2,424 |