Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Significant Accounting Policies and Recent Accounting Pronouncements (Details Textual)

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Note 2 - Significant Accounting Policies and Recent Accounting Pronouncements (Details Textual) - USD ($)
$ in Thousands, shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 8.1 4.8 8.1 4.8
Asset Impairment Charges $ 0 $ 0 $ 0 $ 0