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Note 6 - Preferred Stock
 9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Stockholders' Equity Note Disclosure [Text Block]
(6)
Preferred Stock
 
On March 18, 2009, the Company declared a dividend of one preferred share purchase right (a “Right”) for each outstanding share of common stock, par value $0.01 per share, to the stockholders of record on March 20, 2009. Each Right entitles the registered holder to purchase from the Company one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $0.01 per share (the “Preferred Share”) of the Company, at a price of $25 per one one-thousandth of a Preferred Share subject to adjustment and the terms of the Rights Agreement. The Rights expire on March 19, 2019.