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Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Property, Plant and Equipment [Line Items] |  |  |  |
Net license revenues | $ 1,597 | $ 2,072 | $ 5,681 | $ 6,158
Net revenues | $ 1,923 | $ 2,305 | $ 6,174 | $ 6,966
Percentage of Net revenues | 100.00% | 100.00% | 100.00% | 100.00%
Automotive [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Net license revenues | $ 248 | $ 457 | $ 1,151 | $ 1,714
Percentage of Net license revenues | 13.00% | 20.00% | 19.00% | 25.00%
Consumer electronics [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Net license revenues | $ 1,349 | $ 1,615 | $ 4,530 | $ 4,444
Percentage of Net license revenues | 70.00% | 70.00% | 73.00% | 64.00%
Sensor modules [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Net revenues | $ 39 | $ 211 | $ 176 | $ 634
Percentage of Net revenues | 2.00% | 9.00% | 3.00% | 9.00%
Non-recurring engineering [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Net revenues | $ 287 | $ 22 | $ 317 | $ 174
Percentage of Net revenues | 15.00% | 1.00% | 5.00% | 2.00%

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