SUBSEQUENT EVENTS (Details)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended 1 Months Ended 0 Months Ended 0 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2012
Aug. 31, 2012
Liyuan
USD ($)
Aug. 31, 2012
Liyuan
Minimum
Aug. 31, 2012
Liyuan
Maximum
Jan. 09, 2014
Subsequent event
Short-term loan entered into, January 9, 2014
Agricultural Bank of China
USD ($)
Jan. 09, 2014
Subsequent event
Short-term loan entered into, January 9, 2014
Agricultural Bank of China
CNY
Jan. 11, 2014
Subsequent event
Short-term loan entered into, January 10, 2014
Agricultural Bank of China
USD ($)
Jan. 11, 2014
Subsequent event
Short-term loan entered into, January 10, 2014
Agricultural Bank of China
CNY
Jan. 14, 2014
Subsequent event
Long-term loan entered into, January 14, 2014
Rural Credit Cooperative Union
USD ($)
Jan. 14, 2014
Subsequent event
Long-term loan entered into, January 14, 2014
Rural Credit Cooperative Union
CNY
Mar. 05, 2014
Subsequent event
Long-term loan entered into, March 5, 2014
Bank of China
USD ($)
Mar. 05, 2014
Subsequent event
Long-term loan entered into, March 5, 2014
Bank of China
CNY
Jan. 14, 2014
Subsequent event
Minimum
Long-term loan entered into, January 14, 2014
Rural Credit Cooperative Union
Mar. 05, 2014
Subsequent event
Minimum
Long-term loan entered into, March 5, 2014
Bank of China
Jan. 14, 2014
Subsequent event
Maximum
Long-term loan entered into, January 14, 2014
Rural Credit Cooperative Union
Jan. 09, 2014
Subsequent event
Xiaopengzu
IEL
USD ($)
Jan. 09, 2014
Subsequent event
Xiaopengzu
IEL
Minimum
Jan. 09, 2014
Subsequent event
Xiaopengzu
IEL
Maximum
Jan. 14, 2014
Subsequent event
CPT Wyndham Holdings Ltd.
CPT Wyndham Sub Ltd.
Ordinary shares
USD ($)
Jan. 14, 2014
Subsequent event
CPT Wyndham Holdings Ltd.
CPT Wyndham Sub Ltd.
ADS
USD ($)
Mar. 18, 2014
Subsequent event
Liyuan
USD ($)
Mar. 18, 2014
Subsequent event
Liyuan
CNY
Subsequent Event                                              
Cash consideration for sale of certain power generating assets     $ 7,151                           $ 5,249            
Term of sale and leaseback     3 years                           5 years            
Quarterly lease payment                                 311            
Implicit interest rate on the lease payments (as a percent)     6.50%                           6.72%            
Basis spread on variable rate (as a percent)     0.35%                           0.32%            
Variable rate basis     Benchmark interest rate announced by the People's Bank of China                           Benchmark interest rate announced by the People's Bank of China            
Term of loan for basis spread on variable rate       1 year 3 years                         3 years 5 years        
Loan obtained           1,476 9,000 328 2,000 4,100 25,000 13,613 83,000                    
Interest rate (as a percent)           7.80% 7.80% 7.80% 7.80% 9.00% 9.00% 6.8775% 6.8775%                    
Premium over benchmark interest rate (as a percent)           1.80% 1.80% 1.80% 1.80% 2.60% 2.60% 0.3275% 0.3275%                    
Purchase price (in dollars per share)                                       $ 1.17 $ 3.51    
Benchmark rate used for loans People's Bank of China People's Bank of China       People's Bank of China People's Bank of China People's Bank of China People's Bank of China People's Bank of China People's Bank of China People's Bank of China People's Bank of China                    
Term of debt                           3 years 5 years 5 years              
Insurance recovery received on damage of plant from BOC Insurance Sichuan Branch $ 549                                         $ 955 5,822