Quarterly report pursuant to Section 13 or 15(d)

Acquisition (Schedule of Supplemental Pro Forma Results of Operations) (Details)

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Acquisition (Schedule of Supplemental Pro Forma Results of Operations) (Details) - Tri-State Technical Services [Member] - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]    
Revenues $ 71,583 $ 55,433
Net income $ 2,636 $ 2,130