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NONCONTROLLING INTEREST (Narrative) (Details) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 Erdos Tch Energy Saving Development Co Ltd [Member] USD ($) | Mar. 31, 2013 Erdos Tch Energy Saving Development Co Ltd [Member] CNY | Mar. 31, 2013 Erdos Tch Energy Saving Development Co Ltd [Member] After Modification [Member] | Mar. 31, 2013 Xian Tch Energy Tech Co Ltd [Member] USD ($) | Mar. 31, 2013 Xian Tch Energy Tech Co Ltd [Member] CNY | Mar. 31, 2013 Xian Tch Energy Tech Co Ltd [Member] After Modification [Member]
Noncontrolling Interest [Line Items] |  |  |  |  |  |
Equity interest percentage | 7.00% | 7.00% |  |  |  |
Total registered capital | $ 17.55 | 120.00 |  |  |  |
Profit distribution percentage | 20.00% | 20.00% | 40.00% | 80.00% | 80.00% | 60.00%
Contributed in capital | $ 1.18 | 8.00 |  | $ 16.37 | 112.00 |

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