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Restructuring and Related Charges - Summary of Activity Related to Restructuring (Details) - USD ($) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Provision |  |  | $ 294 |
GridSense [Member] |  |  |  |
Beginning balance | $ 63 | $ 38 | 63 |
Provision | $ 198 |  | 198 |
Cash payments |  |  | (223) |
Adjustment |  | $ (4) |  |
Ending balance |  | $ 34 | $ 38 | $ 63
GridSense [Member] | Other [Member] |  |  |  |
Beginning balance |  |  |  |
Provision |  |  | $ 72 |
Cash payments |  |  | $ (72) |
Adjustment |  |  |  |
Ending balance |  |  |  |
GridSense [Member] | Facilities [Member] |  |  |  |
Beginning balance |  |  |  |
Provision |  |  | $ 7 |
Cash payments |  |  | $ (7) |
Adjustment |  |  |  |
Ending balance |  |  |  |
GridSense [Member] | Employee Severance And Termination Benefits [Member] |  |  |  |
Beginning balance | $ 63 | $ 38 | $ 63 |
Provision |  |  | 119 |
Cash payments |  |  | $ (144) |
Adjustment |  | $ (4) |  |
Ending balance |  | $ 34 | $ 38 | $ 63
OmniMetrix technologies [Member] | Inventory And Fixed Asset Impairements [Member] |  |  |  |
Beginning balance |  |  |  |
Provision |  |  |  |
Cash payments |  |  |  |
Adjustment |  |  |  |
Ending balance |  |  |  |
OmniMetrix technologies [Member] | Facilities [Member] |  |  |  |
Beginning balance | $ 194 | $ 248 | $ 194 |
Provision |  |  | 96 |
Cash payments |  | $ (44) | (42) |
Adjustment |  |  |  |
Ending balance |  | $ 204 | 248 | $ 194
OmniMetrix technologies [Member] | Employee Severance And Termination Benefits [Member] |  |  |  |
Beginning balance | 45 |  | $ 45 |
Provision |  |  |  |
Cash payments |  |  | $ (45) |
Adjustment |  |  |  |
Ending balance |  |  |  | 45
Omni Metrix [Member] |  |  |  |
Beginning balance | $ 239 | $ 248 | $ 239 |
Provision |  |  | 96 |
Cash payments |  | $ (44) | (87) | 194
Adjustment |  |  |  |
Ending balance |  | $ 204 | $ 248 | $ 239

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to 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 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: 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 3: 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 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Amount of (expense) reversal of expense related to a previously accrued restructuring cost liability. Excludes adjustments for costs incurred, costs settled, and foreign currency translation adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 40 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394291&loc=d3e17658-110867 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 SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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