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DIVESTITURES - UTStarcom Hong Kong Holdings Ltd. (Details) - UTStarcom Hong Kong Holdings Ltd - Convertible bonds of privately-held company - USD ($) $ in Millions | Apr. 07, 2015 | Aug. 31, 2012 | Aug. 31, 2012 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
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DIVESTITURES |  |  |  |  |  |
Amount invested |  |  |  | $ 3.5 | $ 3.5 | $ 20.2
Interest rate of debt securities (as a percent) |  | 6.50% | 6.50% |  |  |
Principal amount of debt securities to be converted if P&L run-rate break-even is achieved on or prior to the Maturity Date |  | $ 5.0 | $ 5.0 |  |  |
Percentage of outstanding shares to be issued on conversion if P&L run-rate break-even is achieved on or prior to the Maturity Date |  | 8.00% |  |  |  |
Face amount of convertible debt | $ 20.0 |  |  |  |  |
Cash proceeds from partial payment of the principal of the Convertible Bond | $ 10.0 |  |  |  |  |
Ownership interest upon conversion of preference shares and convertible bonds | 14.00% |  |  |  |  |
Minimum |  |  |  |  |  |
DIVESTITURES |  |  |  |  |  |
Percentage of outstanding shares to be issued on conversion at the Maturity Date |  | 25.00% |  |  |  |
Maximum |  |  |  |  |  |
DIVESTITURES |  |  |  |  |  |
Percentage of outstanding shares to be issued on conversion at the Maturity Date |  | 33.00% |  |  |  |
Disposed of by sale, not discontinued operations | IPTV divestiture |  |  |  |  |  |
DIVESTITURES |  |  |  |  |  |
Amount invested |  | $ 20.0 | $ 20.0 |  |  |

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