NONCONTROLLING INTEREST (Narrative) (Details) In Millions, unless otherwise specified	3 Months Ended
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

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant