OTHER NON-CURRENT ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Aug. 31, 2012
Liyuan
Aug. 31, 2012
Liyuan
Minimum
Aug. 31, 2012
Liyuan
Maximum
Dec. 31, 2013
Dazhaihe
Dec. 31, 2013
Dazhaihe
Dec. 31, 2012
Dazhaihe
Dec. 31, 2013
Dazhaihe
Minimum
Dec. 31, 2013
Dazhaihe
Maximum
OTHER NON-CURRENT ASSETS                    
Long-term prepaid debt insurance cost $ 311 $ 315                
Long-term prepaid rental expenses 3 118                
Long-term prepaid compensation cost 230 337                
Deposits for financing arrangement 1,358 859                
Unamortized service fees 299 187                
Long-term prepaid guarantee fee 19 197                
Total 2,220 2,013                
Other Non-Current Assets                    
Consideration for sale of certain power generating assets     7,151     3,876        
Term of sale and leaseback     3 years     5 years        
Monthly lease payment     219              
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% 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
Quarterly lease payment           230        
Refundable deposit amount paid to IEL 465 858         465 858    
Nonrefundable service fee paid $ 281 $ 354         $ 281 $ 354