Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Earnings per Share) (Details)

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Summary of Significant Accounting Policies (Earnings per Share) (Details) - shares
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Accounting Policies [Abstract]    
Basic weighted average shares outstanding 7,031,400 7,023,300
Effect of common stock equivalents — stock issuable under outstanding equity awards 91,000 86,000
Diluted weighted average shares outstanding 7,122,400 7,108,500