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Shareholders' Equity (Details) - USD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 12, 2017 | Oct. 10, 2016 | Nov. 30, 2016 | Jun. 30, 2018 | Jun. 30, 2017
Class of Stock [Line Items] |  |  |  |  |
Cash dividends declared | $ 0.12 |  | $ 0.10 |  |
Dividends | $ 1,400,000 |  | $ 1,000,000 | $ 1,403,000 | $ 1,040,000
Dividend paid date | Jan. 09, 2018 |  | Jan. 06, 2017 |  |
Dividend record date | Dec. 26, 2017 |  | Dec. 21, 2016 |  |
Symmetric Capital II LLC [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Shares issued in private placement |  | 1,290,323 |  |  |
Shares issued in private placement, value |  | $ 6,000,000 |  |  |

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