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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares | 3 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017
Statement of Stockholders' Equity [Abstract] |  |
Number of shares repurchase of distributed restricted stock in settlement of employee withholding tax obligations | 20,566 | 0
Cash dividends per share | $ 0.14 | $ 0.14

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