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Note 9 - Share-based Compensation | 9 Months Ended
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Mar. 31, 2019
Notes to Financial Statements |
Share-based Payment Arrangement [Text Block] | Note 9. Share-based Compensation: During the nine months ended March 31, 2019 and 2018, the Company granted 0.9 million and 1.1 million stock options at weighted average grant prices of $173.89 and $120.34 and weighted average fair values of $34.66 and $21.98, respectively. During the nine months ended March 31, 2019 and 2018, the Company granted 56,403 and 65,924 restricted stock units at a weighted average fair value of $170.96 and $128.30, respectively. During the nine months ended March 31, 2019 and 2018, the Company granted 14,877 and 20,106 shares of restricted common stock shares at a grant date fair value of $177.93 and $125.05, respectively. Stock options for 263,995 and 139,602 shares of common stock with total intrinsic values of $22.3 million and $6.3 million were exercised during the nine months ended March 31, 2019 and 2018, respectively. Stock-based compensation expense of $5.7 million and $4.7 million was included in selling, general and administrative expenses for the quarter ended March 31, 2019 and 2018, respectively. Stock-based compensation expense of $ 24.2 million and $13.6 million was included in selling, general, and administrative expenses for the nine months ended March 31, 2019 and 2018, respectively. As of March 31, 2019, there was $32.1 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 2.1 years.

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