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Note 6 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | Aug. 06, 2018 | Nov. 08, 2017
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Maximum Aggregate Offering Price |  | $ 200.0
Stock Issued During Period, Shares, New Issues | 10,455 |
Shares Issued, Price Per Share | $ 5.50 |
Proceeds from Issuance of Common Stock | $ 53.4 |

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- Definition Represents the maximum aggregate offering price of common stock, preferred stock, depository shares, stock purchase contracts, warrants and units. + References No definition available. + Details
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