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THE COMPANY AND ITS SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 01, 2016 | Dec. 31, 2017 USD ($) segment | Dec. 31, 2016 USD ($)
Stock dividend (as a percent) | 25.00% |  |
Number of reportable segments | segment |  | 1 |
Cash held in banks, not insured |  | $ 4,900 | $ 4,800
Funds, fully insured |  | $ 250 | 250
Minimum |  |  |
Estimated useful lives |  | 2 years |
Maximum |  |  |
Estimated useful lives |  | 5 years |
China |  |  |
Cash held in banks, not insured |  | $ 1,700 | 639
Singapore |  |  |
Cash held in banks, not insured |  | $ 676 | $ 43

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