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Acquisitions (Narrative) (Details) - USD ($)			1 Months Ended		12 Months Ended
	Feb. 09, 2018	Oct. 10, 2016	Oct. 31, 2017	Jun. 19, 2017	Jun. 30, 2018
Business Acquisition [Line Items]
Revenue from acquisitions included in consolidated results of operations					$ 26,300,000
Net income from acquisitions included in consolidated results of operations					800,000
Symmetric Capital II LLC [Member]
Business Acquisition [Line Items]
Shares issued in private placement		1,290,323
Shares issued in private placement, value		$ 6,000,000
Western State Design [Member]
Business Acquisition [Line Items]
Cash Consideration					$ 18,500,000
Stock Consideration					2,044,990
Proceeds from line of credit					$ 12,500,000
Acquisition legal and other professional fees					478,000
Total purchase price for accounting purposes					34,600,000
Cash acquired					$ 5,100,000
Closing price					$ 7.85
Western State Design [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets acquired					$ 2,400,000
Western State Design [Member] | Customer-related intangible assets [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired					$ 3,600,000
Amortized life					10 years
Western State Design [Member] | Covenants not to compete [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired					$ 400,000
Amortized life					5 years
Western State Design [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Amortized life					15 years
Martin-Ray Acquisition [Member]
Business Acquisition [Line Items]
Cash Consideration				$ 2,000,000
Stock Consideration				98,668
Martin-Ray Acquisition [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets acquired				$ 300,000
Martin-Ray Acquisition [Member] | Customer-related intangible assets [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired				600,000
Martin-Ray Acquisition [Member] | Covenants not to compete [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired				100,000
Martin-Ray Acquisition [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired				$ 2,600,000
Tri-State Technical Services [Member]
Business Acquisition [Line Items]
Cash Consideration			$ 7,952,000		$ 8,250,000
Stock Consideration			338,115		338,115
Acquisition legal and other professional fees					$ 137,000
Total purchase price for accounting purposes					17,300,000
Cash acquired					$ 1,800,000
Closing price					$ 26.70
Tri-State Technical Services [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets acquired					$ 1,500,000
Tri-State Technical Services [Member] | Customer-related intangible assets [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired					$ 3,700,000
Amortized life					10 years
Tri-State Technical Services [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Amortized life					15 years
AA Acquisition [Member]
Business Acquisition [Line Items]
Cash Consideration	$ 8,100,000				$ 8,119,000
Stock Consideration	348,360				348,360
Acquisition legal and other professional fees					$ 160,000
Total purchase price for accounting purposes					20,400,000
Cash acquired					$ 900,000
Closing price					$ 35.45
AA Acquisition [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Indefinite lived intangible assets acquired					$ 1,800,000
AA Acquisition [Member] | Customer-related intangible assets [Member]
Business Acquisition [Line Items]
Finite lived intangible assets acquired					$ 2,500,000
Amortized life					10 years
AA Acquisition [Member] | Goodwill [Member]
Business Acquisition [Line Items]
Amortized life					15 years

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