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Related Party Balances and Transactions (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |  |
Revenues | $ 34,050 | $ 37,233 | $ 29,510
Expenses: |  |  |
Cost of revenues | 8,866 | 10,488 | 8,982
Operating expenses: |  |  |
Research and development, net | 15,503 | 10,562 | 8,047
Sales and marketing, net | 11,426 | 10,996 | 8,528
General and administrative | 3,391 | 4,191 | 4,523
Related Party [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Revenues | 16,369 | 24,559 | 18,461
Expenses: |  |  |
Cost of revenues | 163 | 201 | 210
Operating expenses: |  |  |
Research and development, net | 507 | 371 | 224
Sales and marketing, net | 212 | 217 | 142
General and administrative | 191 | 293 | 250
Capital expenses | $ 40 | $ 9 | $ 21

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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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