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SUBSEQUENT EVENTS (Details) (USD $) | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended |  |  |  | 0 Months Ended | 1 Months Ended |  | 0 Months Ended |
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Dec. 31, 2012 | Dec. 31, 2011 | Sep. 21, 2012 Proposed or pending approval Bodashutong item | Nov. 30, 2012 Tender offer repurchase program | Jan. 10, 2013 Tender offer repurchase program | Dec. 31, 2012 Tender offer repurchase program | Dec. 31, 2012 Subsequent Events Bodashutong | Dec. 31, 2011 Subsequent Events Bodashutong | Mar. 22, 2013 Subsequent Events NGN | Mar. 22, 2013 Subsequent Events DOCSIS-EOC | Jan. 10, 2013 Subsequent Events Tender offer repurchase program | Mar. 21, 2013 Subsequent Events One-for-Three Reverse Share Split | Mar. 27, 2013 Subsequent Events "Go Private" Proposal Mr. Lu | Mar. 27, 2013 Subsequent Events "Go Private" Proposal Shah Capital | Mar. 27, 2013 Subsequent Events "Go Private" Proposal Proposed or pending approval item
Tender Offer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares authorized to be repurchased under a tender offer |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |
Ordinary shares after reverse share split authorized to be repurchased under a tender offer |  |  |  | 8,333,333 |  |  |  |  |  |  |  |  |  |  |
Share price (in dollars per share) | $ 3.09 |  |  | $ 1.20 |  |  |  |  |  |  |  |  |  |  |
Share price after reverse share split (in dollars per share) |  |  |  | $ 3.60 |  |  |  |  |  |  |  |  |  |  |
Ordinary shares repurchased |  |  |  |  | 25,000,000 |  |  |  |  |  | 25,000,000 |  |  |  |
Ordinary shares after reverse share split |  |  |  |  |  | 8,333,333 |  |  |  |  | 8,333,333 |  |  |  |
Repurchase of ordinary shares | $ 8,842,000 | $ 6,301,000 |  |  | $ 30,000,000 |  |  |  |  |  | $ 30,000,000 |  |  |  |
One-for-Three Reverse Share Split |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Authorized share capital (in shares) | 250,000,000 | 250,000,000 |  |  |  |  |  |  |  |  |  | 250,000,000 |  |  |
Par value of shares (in dollars per share) | $ 0.00375 | $ 0.00375 |  |  |  |  |  |  |  |  |  | $ 0.00375 |  |  |
Disposal of Bodashutong |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount invested |  |  |  |  |  |  |  | 600,000 |  |  |  |  |  |  |
Equity interest owned (as a percent) |  |  |  |  |  |  | 30.00% |  |  |  |  |  |  |  |
Number of shareholders to whom the equity interest is transferred equally |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Equity interest transferred to three shareholders |  |  | 600,000 |  |  |  |  |  |  |  |  |  |  |  |
Receipt of Go Private Proposal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share price offered in proposal to purchase shares of UTStarcom (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3.20
Number of independent directors in special committee |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3
Investment, ownership interest (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 3.20% | 17.60% |
NGN spin off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment from divestment to third party |  |  |  |  |  |  |  |  | 2,700,000 |  |  |  |  |  |
DOCSIS-EOC disposal |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration for disposal of product from third party |  |  |  |  |  |  |  |  |  | $ 1,800,000 |  |  |  |  |

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