Acquisitions (Schedule of Purchase Price) (Details) - USD ($) $ in Thousands		9 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Purchase price consideration:
Cash consideration, net of cash acquired		$ 13,352	$ 13,394
Tri-State Technical Services [Member]
Purchase price consideration:
Cash consideration, net of cash acquired	[1]	6,177
Stock consideration	[2]	9,028
Total purchase price, net of cash acquired		15,205
AA Acquisition [Member]
Purchase price consideration:
Cash consideration, net of cash acquired	[3]	7,175
Stock consideration	[4]	12,349
Total purchase price, net of cash acquired		$ 19,524

[1] Includes $7,952,000 paid at closing (inclusive of a preliminary working capital adjustment) net of $1.8 million of cash acquired.

[2] Calculated as 338,115 shares of the Company's common stock, multiplied by $26.70, the closing price of the Company's common stock on the closing date.

[3] Includes $8,119,000 paid at closing (inclusive of a preliminary working capital adjustment) net of $0.9 million of cash acquired.

[4] Calculated as 348,360 shares of common stock, multiplied by $35.45, the closing price of the Company's common stock on the closing date.