Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 34.00% | 34.00% | 34.00% |
| Operating Loss Carryforwards | $ 50,400 | $ 55,600 | |
| Deferred Tax Assets, Operating Loss Carryforwards | 17,123 | 18,910 | |
| Charitable Contribution Carryovers | 690 | 1,000 | |
| Deferred Tax Assets, Charitable Contribution Carryforwards | 235 | 355 | |
| Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 2,600 | 2,466 | |
| Deferred Tax Assets, Valuation Allowance | 355 | ||
| Deferred Tax Assets, Charitable Contribution Utilized | $ 353 | ||
| Charitable Contribution [Member] | |||
| Deferred Tax Assets, Valuation Allowance | 355 | ||
| AMT Credit [Member] | |||
| Tax Credit Carryforward, Amount | $ 2,500 | ||