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Impairment, Restructuring and Other Charges - Restructuring and other charges(Details) - USD ($) $ in Thousands	3 Months Ended		15 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017
Impairment, restructuring and other charges
Impairment charges		$ 5,418
Acquisition-related costs	$ 820	3,874
Employee termination costs	240	471
Facility closures/consolidation	70	176
Other charges		18
Total expensed	1,130	9,957
Explosive Trace Detection Business
Impairment, restructuring and other charges
Acquisition-related costs	700		$ 1,700
Security Division
Impairment, restructuring and other charges
Impairment charges		5,332
Acquisition-related costs		725
Employee termination costs	240	150
Facility closures/consolidation	70	176
Other charges		7
Total expensed	310	6,390
Healthcare Division
Impairment, restructuring and other charges
Impairment charges		86
Employee termination costs		256
Total expensed		342
Optoelectronics and Manufacturing Division
Impairment, restructuring and other charges
Employee termination costs		65
Total expensed		65
Corporate
Impairment, restructuring and other charges
Acquisition-related costs	820	3,149
Other charges		11
Total expensed	$ 820	$ 3,160

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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