Quarterly report pursuant to Section 13 or 15(d)

Acquisition (Narrative) (Details)

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Acquisition (Narrative) (Details) - Tri-State Technical Services [Member] - USD ($)
1 Months Ended 6 Months Ended
Oct. 31, 2017
Dec. 31, 2017
Business Acquisition [Line Items]    
Cash Consideration $ 7,950,000 $ 7,952,000
Stock Consideration 338,115 338,115
Acquisition legal and other professional fees   $ 137,000
Total purchase price for accounting purposes   17,000,000
Cash acquired   $ 1,800,000
Closing price   $ 26.70
Goodwill [Member]    
Business Acquisition [Line Items]    
Amortized life   15 years
Trade Names [Member]    
Business Acquisition [Line Items]    
Indefinite lived intangible assets acquired   $ 1,500,000
Customer-related intangible assets [Member]    
Business Acquisition [Line Items]    
Finite lived intangible assets acquired   $ 3,600,000
Amortized life   10 years