Acquisition (Schedule of Allocation of purchase price consideration) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Allocation of purchase price consideration (in thousands):
Goodwill	$ 29,808	$ 24,753
Tri-State Technical Services [Member]
Allocation of purchase price consideration (in thousands):
Accounts receivable	3,416
Inventory	2,747
Other assets	1,565
Property, plant and equipment	806
Intangible assets	5,100
Accounts payable and accrued expenses	(2,220)
Customer deposits	(1,289)
Total identifiable net assets	10,125
Goodwill	5,080
Total	$ 15,205

Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of other liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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