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CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS - Summary of Equity Investee Data (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating data: |  |  |
Income (loss) from operations | $ 950 | $ (9) | $ (2)
Net income (loss) | 2,812 | (9) | (2)
Net income (loss) attributable to Equity method investees | 984 | (3) | (1)
Balance sheet data: |  |  |
Current assets | 18,616 | 7 | 7
Long-term assets | 105 | 18,238 | 18,381
Current liabilities | $ (11,669) | $ (14,135) | $ (14,233)

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