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Inventories (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Long Term Inventory [Line Items] |  |
Finished products, Systems at customer locations | $ 7,546 | $ 3,425
Long-term inventory | 2,056 | 1,383
Spare parts included in noncurrent inventory | 2,056 | 1,383
Obsolescence provision | $ 143 | $ 84
Minimum [Member] |  |
Long Term Inventory [Line Items] |  |
Customer support, term | 7 years |
Maximum [Member] |  |
Long Term Inventory [Line Items] |  |
Customer support, term | 10 years |

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- Definition Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(d)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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