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Note 8 - Share Repurchase Program | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Treasury Stock [Text Block] | 8 . Share Repurchase Program In December 2007, our Board of Directors approved and we announced a share repurchase program to repurchase up to one million shares of our common stock either through purchases on the open market or through private transactions and in accordance with Rule 10b - 18 of the Exchange Act. In November 2015, our Board of Directors approved and we announced an increase in the share repurchase program, providing for the repurchase of up to $40 million, or approximately 2 million shares, of our common stock , which was increased by our Board of Directors to 3.3 million shares on August 15, 2017 to reflect the five -for- three stock split effected in the form of a stock dividend on July 7, 2017. The timing and extent to which we repurchase shares depends on market conditions and other corporate considerations. The repurchase program does not have an expiration date. We repurchased and retired 759,302 shares of our common stock for $7.5 million in the first quarter of 2016 and did not repurchase any shares in the last three quarters of 2016 or in 2017. In the fourth quarter of 2015 we repurchased and retired 1.6 million shares of our common stock for $16.2 million.

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- Definition The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=2208821 + Details
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