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Description of Business (Details) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 23, 2016 USD ($) $ / shares shares | Nov. 12, 2015 USD ($) | Apr. 01, 2017 USD ($) patent | Apr. 02, 2016 USD ($) | Dec. 31, 2016 USD ($) | Jan. 02, 2016 USD ($)
Description of Business |  |  |  |  |  |
Number of issued and pending U.S. and foreign patents | patent |  |  | 100 |  |  |
Net loss |  |  | $ (3,342) | $ (1,413) | $ 11,200 | $ 20,500
NRE fee received from Samsung |  | $ 8,000 |  |  |  |
Proceeds from issuance of SVIC Note and SVIC Warrant |  | $ 15,000 |  |  |  |
Common stock shares issued | shares | 9,200,000 |  |  |  |  |
Shares Issued, Price Per Share | $ / shares | $ 1.25 |  |  |  |  |
Proceeds from issuance of common stock | $ 10,300 |  |  |  |  |

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