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Note 12 - Preferred Stock	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	(12 ) 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 on March 20, 2009, to the stockholders of record on that date. 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 $25.00 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.

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- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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