DISCONTINUED OPERATIONS (Details)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Dec. 31, 2012
Yuanping
USD ($)
Mar. 02, 2012
Yuanping
USD ($)
Dec. 03, 2011
Yuanping
USD ($)
Dec. 03, 2011
Yuanping
CNY
Dec. 03, 2011
Yuanping
PRC
item
Dec. 31, 2012
Yuheng
USD ($)
Oct. 31, 2012
Yuheng
USD ($)
Oct. 18, 2012
Yuheng
USD ($)
Oct. 18, 2012
Yuheng
CNY
Oct. 18, 2012
Yuheng
PRC
item
Discontinued operations                          
Ownership interest percentage held in discontinued operations           100.00% 100.00%       100.00% 100.00%  
Total consideration in cash           $ 11,276 71,050       $ 21,269 134,000  
Number of businesses operated               1         1
Right to use water generated by dam assigned (as a percent)           36.48% 36.48%            
Assets:                          
Cash and cash equivalents         56         472      
Property, plant and equipment, net         17,304         18,509      
Goodwill         3,219         23,448      
Intangible assets, net         617         1,916      
Deferred tax assets         259         174      
Prepayments and other current assets         328         241      
Total         21,783         44,760      
Liabilities:                          
Current portion of long-term loans         477         14,920      
Accrued expenses and other current liabilities         163         2,256      
Long-term loans         10,489         7,301      
Deferred tax liabilities         827         2,046      
Other non-current liabilities                   33      
Total         11,956         26,556      
Results of discontinued operations                          
Revenues   4,661 4,737                    
Cost of revenues   (1,131) (2,098)                    
General and administrative expenses   (176) (226)                    
Interest income   2 2                    
Interest expense   (1,634) (2,580)                    
Other (loss) income, net   3,543 (16)                    
Income tax expense   (1,358) (101)                    
Net (loss) income from discontinued operations   3,907 (282)                    
Gain on disposal from disposition   2,767   1,819         1,907        
Tax effects of gain on disposal from disposition $ 0 $ 959 $ 0