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Note 4 - Share-based Compensation | 3 Months Ended
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Sep. 30, 2015
Notes to Financial Statements |
Disclosure of Compensation Related Costs, Share-based Payments [Text Block] | Note 4. Share-based Compensation: During the quarters ended September 30, 2015 and 2014, the Company granted 736,000 and 467,000 stock options at weighted average grant prices of $106.66 and $93.95 and weighted average fair values of $18.48 and $13.93, respectively. During the quarter ended September 30, 2015 and 2014, the Company granted 35,000 and 34,000 restricted stock units at a weighted average fair value of $105.01 and $93.70, respectively. During the quarter ended September 30, 2015, the Company granted 12,000 shares of restricted common stock at a fair value of $108.49. Stock-based compensation expense of $2.0 million and $1.4 million was included in selling, general and administrative expenses for the quarters ended September 30, 2015 and 2014, respectively. As of September 30, 2015, there was $21.7 million of unrecognized compensation cost related to non-vested stock options, non-vested restricted stock units and non-vested restricted stock. The weighted average period over which the compensation cost is expected to be recognized is 2.8 years. Stock options for 12,500 and 28,000 shares of common stock with total intrinsic values of $0.5 million and $0.2 million were exercised during the quarters ended September 30, 2015 and 2014, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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