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Note 18 - Rights Agreement (Detail) | Apr. 24, 2019 | Sep. 29, 2012 | Sep. 09, 2012 | May 17, 1999
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Class Of Warrant Or Right Dividend Distritbution Terms |  |  |  | the Company's Board of Directors declared a dividend distribution of one right per share of the Company's outstanding common stock as of May 17, 1999 pursuant to a Rights Agreement, dated as of April 27, 1999. The Rights Agreement also provides that one right will attach to each share of the Company's common stock issued after May 17, 1999
Class Of Warrant Or Right Distribution Date |  | The rights are not currently exercisable but trade with the Company's common stock shares and become exercisable on the distribution date. The distribution date will occur upon the earliest of 10 business days following a public announcement that either a person or group of affiliated or associated persons (an "acquiring person") has acquired, or obtained the right to acquire, beneficial ownership of 20% or more (after adjustment for certain derivative transactions) of the outstanding shares of common stock (the "stock acquisition date"), or of a tender offer or exchange offer that would, if consummated, result in an acquiring person beneficially owning 20% or more of such outstanding shares of common stock, subject to certain limitations |  |
Preferred Stock Dividend Distribution Terms |  | Each right will entitle the holder, other than the acquiring person or group, to purchase one two-hundredths of a share (a "Unit") of the Company's Series A Junior Participating Preferred Stock ("Preferred Stock") |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) |  | 0.005 |  |
Alternative Right Exercise Options |  | At the time specified, each holder of a right will have the right to receive in lieu of Preferred Stock, upon exercise and payment of the purchase price, common stock (or, in certain circumstances, cash, property or other securities of the Company) having a value equal to two times the purchase price or, at the discretion of the Board, upon exercise and without payment of the purchase price,common stock (or, in certain circumstances, cash, property or other securities of the Company) having a value equal to the difference between the purchase price and the value of the consideration which a person exercising the right and paying the purchase price would receive. Rights that are or (under specified circumstances) were, beneficially owned by any acquiring person will be null and void. The purchase price payable and the number of Units of Preferred Stock or other securities or property issuable upon exercise of the rights are subject to adjustment from time to time. At any time after any person becomes an acquiring person, the Company may exchange all or part of the rights for shares of common stock at an exchange ratio of one share per right, as appropriately adjusted to reflect any stock dividend, stock split or similar transaction |  |
Additional Rights Available When Acquired By Corporation |  |  | In addition, each rights holder, other than an acquiring person, upon exercise of rights will have the right to receive shares of the common stock of the acquiring corporation having a value equal to two times the purchase price for such holder's rights if the Company engages in a merger or other business combination where it is not the surviving entity or where it is the surviving entity and all or part of the Company's common stock is exchanged for the stock or other securities of the other company, or if 50% or more of the Company's assets or earning power is sold or transferred |
Rights Expiration Date | April 24, 2019 |  |  |
Series A Junior Participating Preferred Stock [Member] |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) |  | 46 |  |

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- Definition The exercise price of each class of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
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