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Operating Segments (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) segment | Dec. 31, 2016 USD ($)
Segment Reporting [Abstract] |  |  |
Number of reportable segments | segment | 2 | 2 |
Revenue from foreign sources | $ | $ 19,782 | $ 22,870 | $ 22,422

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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