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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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