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Impairment, restructuring and other charges - Restructuring and other charges(Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 18 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017
Impairment, restructuring and other charges |  |  |  |  |  |
Employee termination and facility consolidation costs | $ 500 |  |  | $ 800 |  |
Impairment charges | 3,144 |  |  | 3,144 | $ 5,418 |
Acquisition-related costs | 361 | $ 149 |  | 1,181 | 4,023 |
Employee termination costs | 236 | 8,747 |  | 476 | 9,218 |
Facility closures/consolidation | 254 | 96 |  | 324 | 272 |
Litigation and accrued settlement costs | 4,302 |  |  | 4,302 |  |
Other charges (reversals) |  | 428 |  |  | 446 |
Total expensed | 8,297 | 9,420 |  | 9,427 | 19,377 |
Explosive Trace Detection Business ("ETD") |  |  |  |  |  |
Impairment, restructuring and other charges |  |  |  |  |  |
Acquisition-related costs | 200 |  |  | 900 |  | $ 1,900
Security Division |  |  |  |  |  |
Impairment, restructuring and other charges |  |  |  |  |  |
Impairment charges | 1,490 |  | $ 5,400 | 1,490 | 5,332 |
Acquisition-related costs |  | 85 |  |  | 810 |
Employee termination costs | 90 | 7,657 |  | 330 | 7,807 |
Facility closures/consolidation | 11 | 3 |  | 81 | 179 |
Other charges (reversals) |  |  |  |  | 7 |
Total expensed | 1,591 | 7,745 |  | 1,901 | 14,135 |
Healthcare Division |  |  |  |  |  |
Impairment, restructuring and other charges |  |  |  |  |  |
Impairment charges | 579 |  |  | 579 | 86 |
Employee termination costs |  | 824 |  |  | 1,080 |
Facility closures/consolidation | 243 | 69 |  | 243 | 69 |
Litigation and accrued settlement costs | 4,200 |  |  | 4,200 |  |
Total expensed | 5,022 | 893 |  | 5,022 | 1,235 |
Optoelectronics and Manufacturing division |  |  |  |  |  |
Impairment, restructuring and other charges |  |  |  |  |  |
Impairment charges | 1,075 |  |  | 1,075 |  |
Employee termination costs | 146 | 266 |  | 146 | 331 |
Facility closures/consolidation |  | 24 |  |  | 24 |
Other charges (reversals) |  | (67) |  |  | (67) |
Total expensed | 1,221 | 223 |  | 1,221 | 288 |
Corporate |  |  |  |  |  |
Impairment, restructuring and other charges |  |  |  |  |  |
Acquisition-related costs | 361 | 64 |  | 1,181 | 3,213 |
Litigation and accrued settlement costs | 102 |  |  | 102 |  |
Other charges (reversals) |  | 495 |  |  | 506 |
Total expensed | $ 463 | $ 559 |  | $ 1,283 | $ 3,719 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 225 -Section 45 -Paragraph 11 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84241808&loc=d3e92212-112881 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 + Details
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- Definition Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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