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Note 15 - Shareholder Rights Plan | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Stockholders' Equity Note Disclosure [Text Block] | 15. Shareholder Rights Plan On April 4, 2008, the Board of Directors of the Company adopted a Shareholder Rights Plan (the “2008 Plan”). The 2008 Plan expired on April 8, 2018, and the Company did not extend the 2008 Plan or adopt a new Shareholder Rights Plan.

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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