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Acquisitions (Narrative) (Details) - USD ($) |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Feb. 05, 2019 | Sep. 12, 2018 | Feb. 09, 2018 | Oct. 31, 2017 | Jun. 30, 2019 | Jun. 30, 2018
Business Acquisition [Line Items] |  |  |  |  |  |
Revenue from acquisitions included in consolidated results of operations |  |  |  |  | $ 98,800,000 |
Net income from acquisitions included in consolidated results of operations |  |  |  |  | 2,900,000 |
Tri-State Technical Services [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash Consideration |  |  |  | $ 7,952,000 |  |
Stock Consideration |  |  |  | 338,115 |  |
Acquisition legal and other professional fees |  |  |  |  |  | $ 137,000
Total purchase price for accounting purposes |  |  |  |  |  | 17,300,000
Cash acquired |  |  |  |  |  | 1,800,000
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 |  |  |
Stock Consideration |  |  | 348,360 |  |  |
Acquisition legal and other professional fees |  |  |  |  |  | 160,000
Total purchase price for accounting purposes |  |  |  |  | $ 8,119,000 | 20,400,000
Cash acquired |  |  |  |  | $ 900,000 | $ 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 |
SEI Acquisition [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash Consideration |  | $ 6,500,000 |  |  |  |
Stock Consideration |  | 209,678 |  |  |  |
Acquisition legal and other professional fees |  |  |  |  | $ 65,000 |
Total purchase price for accounting purposes |  |  |  |  | 15,900,000 |
Cash acquired |  |  |  |  | $ 2,800,000 |
Closing price |  |  |  |  | $ 45.00 |
SEI Acquisition [Member] | Trade Names [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Indefinite lived intangible assets acquired |  |  |  |  | $ 1,300,000 |
SEI Acquisition [Member] | Customer-related intangible assets [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible assets acquired |  |  |  |  | $ 1,800,000 |
Amortized life |  |  |  |  | 10 years |
SEI Acquisition [Member] | Goodwill [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Amortized life |  |  |  |  | 15 years |
PAC Acquisition [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash Consideration | $ 6,400,000 |  |  |  |  |
Stock Consideration | 179,847 |  |  |  |  |
Number of shares transferred to PAC's ESOP |  |  |  |  | 114,634 |
Acquisition legal and other professional fees |  |  |  |  | $ 182,000 |
Total purchase price for accounting purposes |  |  |  |  | 13,100,000 |
Cash acquired |  |  |  |  | $ 1,100,000 |
Closing price |  |  |  |  | $ 36.99 |
PAC Acquisition [Member] | Trade Names [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Indefinite lived intangible assets acquired |  |  |  |  | $ 1,100,000 |
PAC Acquisition [Member] | Customer-related intangible assets [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible assets acquired |  |  |  |  | $ 1,900,000 |
Amortized life |  |  |  |  | 10 years |
PAC Acquisition [Member] | Goodwill [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Amortized life |  |  |  |  | 15 years |
Other Acquisition [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash Consideration |  |  |  |  | $ 3,500,000 |
Stock Consideration |  |  |  |  | 141,000 |
Cash acquired |  |  |  |  | $ 738,000 |
Other Acquisition [Member] | Trade Names [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible assets acquired |  |  |  |  | 4,500,000 |
Other Acquisition [Member] | Customer-related intangible assets [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible assets acquired |  |  |  |  | 1,300,000 |
Other Acquisition [Member] | Goodwill [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Finite lived intangible assets acquired |  |  |  |  | $ 690,000 |

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