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EARNINGS PER SHARE (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
EARNINGS PER SHARE [Abstract]      
Net income (loss) attributable to Daqo New Energy Corp. $ (111,928,941) $ 33,323,952 $ 65,271,257
Net income (loss) attributable to Daqo New Energy Corp. ordinary shareholders-basic (111,928,941) 33,323,952 54,691,886
Net income (loss) attributable to preferred shareholders for participating rights to dividends-basic       10,579,371
Net income (loss) attributable to Daqo New Energy Corp. ordinary shareholders-diluted $ (111,928,941) $ 33,323,952 $ 65,271,257
Weighted average number of ordinary shares outstanding used in computing earnings per share-basic 175,067,343 175,714,103 117,839,487
Weighted average ordinary shares as if converted by Series A convertible redeemable preferred shares-basic       22,794,380
Share options       92,456
Weighted average number of ordinary shares outstanding used in computing earnings per share-diluted 175,067,343 175,714,103 140,726,323
NET INCOME (LOSS) ATTRIBUTABLE TO DAQO NEW ENERGY CORP. PER ORDINARY SHARE-Basic $ (0.64) $ 0.19 $ 0.46
NET INCOME (LOSS) ATTRIBUTABLE TO DAQO NEW ENERGY CORP. PER ORDINARY SHARE-Diluted $ (0.64) $ 0.19 $ 0.46
Outstanding employee options excluded from computation of diluted earnings per share 7,179,500 6,805,000 2,295,000