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v3.19.2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares | Jun. 30, 2019 | Dec. 31, 2018
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Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01
Preferred stock, shares authorized (in shares) | 5,000,000 | 5,000,000
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.01
Common stock, shares authorized (in shares) | 200,000,000 | 200,000,000
Common stock, shares outstanding (in shares) | 111,149,840 | 111,757,105

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