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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

Long Term Inventory Line Items.

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Period Of Customer Support In 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

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- Definition

Amount of valuation reserve for inventory.

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-Topic 330
-SubTopic 10
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- Definition

Gross amount of components of assembled products that can be sold directly or indirectly through sales of assembled products.

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Gross amount of merchandise or materials to which the entity holds the title, but physically at another entity's facilities (for example, but not limited to, work in process may be temporarily at the site of a subcontractor).

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