INCOME TAX EXPENSE (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income tax expenses      
Income tax rate (as a percent) 25.00% 25.00% 25.00%
Income (loss) before income tax expense $ 956 $ 1,395 $ (53,481)
Components of income tax expenses      
Current income tax expenses 3,956 7,013 2,113
Deferred income tax benefit (482) (562) (586)
Income tax expenses 3,474 6,451 1,527
Reconciliation of the effective income tax provisions to the amount computed by applying the statutory tax rate to (loss) income before income taxes      
Taxation at PRC statutory tax rate of 25% 239 349 (13,370)
Effect of non-PRC entities not subject to income tax 856 2,161 4,564
Effect of tax holiday (8) (466)  
Effect of preferential tax rate (119) (14) (248)
Current and deferred tax rate differential 762 1,167 1,015
Deemed interest income 46 276 1,010
Non-deductible expenses 1,447 3,041 4,337
Change in valuation allowance 1,041 575 3,818
Impact of changes in enacted tax rates     (325)
Prior year tax audit adjustment     190
PRC withholding tax on the outside basis difference of the discontinued operations     136
Provision for (reversal of) PRC dividend withholding tax 300 (296) 400
Effect of changes in the tax basis of property, plant and equipment (391) (225)  
Reduction to unrecognized tax benefits due to lapse of statute of limitations (699) (117)  
Income tax expenses 3,474 6,451 1,527
Effective Tax Rate (as a percent) 363.39% 462.44% (2.86%)
Effect of tax holidays on basic and diluted loss per share      
Aggregate amount 8 466  
Basic and diluted (in dollars per share)   $ 0.003  
Reconciliation of accrued unrecognized tax benefits      
Balance at the beginning of the period 6,077 6,093 3,743
Addition for tax positions taken in the current year 464 396 459
Reclassified from income tax payable for tax positions of prior years 1,729 1,138 2,336
Reduction for tax positions of prior years (27) (171) (87)
Lapse of statute of limitations (669) (117)  
Reclassified to liabilities directly associated with the assets classified as held-for-sale or disposal of discontinued operations   (1,276) (618)
Foreign currency translation 211 14 260
Balance at the end of the period 7,785 6,077 6,093
Unrecognized tax benefits, which if recognized, would affect the effective tax rate 5,481 4,159  
Portion of unrecognized tax benefits presented on a net basis as deferred tax asset related to net operating loss 1,582 986  
Interest on unrecognized tax benefits recognized in interest expense 68 576 457
Unrecognized tax benefits included in other non-current liabilities 6,203 5,091  
Accrued interests on unrecognized tax benefits 1,697 1,583  
Penalty recognized in relation to unrecognized tax benefits 0    
PRC
     
Income tax expenses      
Income tax rate (as a percent) 25.00%    
Income tax exemption period 2 years    
Income tax rate reduction period 3 years    
Percentage of tax reduction 50.00%    
Income (loss) before income tax expense 4,379 10,037 (35,229)
PRC | From 2010 to 2020
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2010 to 2020 | Binglangjiang
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2010 to 2020 | Husahe
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2010 to 2011 | Liyuan
     
Income tax expenses      
Preferential income tax rate (as a percent) 7.50%    
PRC | From 2010 to 2011 | Hengda
     
Income tax expenses      
Preferential income tax rate (as a percent) 7.50%    
PRC | From 2012 to 2020 | Liyuan
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2012 to 2020 | Hengda
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2014 to 2020 | Xineng
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2014 to 2020 | Xiaopengzu
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | From 2014 to 2020 | Dazhaihe
     
Income tax expenses      
Preferential income tax rate (as a percent) 15.00%    
PRC | In 2011 | Dazhaihe
     
Income tax expenses      
Preferential income tax rate (as a percent) 7.50%    
PRC | From 2012 to 2013 | Dazhaihe
     
Income tax expenses      
Preferential income tax rate (as a percent) 12.50%    
PRC | From 2010 to 2012 | Banzhu
     
Income tax expenses      
Preferential income tax rate (as a percent) 12.50%    
PRC | From 2011 to 2013 | Xineng
     
Income tax expenses      
Preferential income tax rate (as a percent) 7.50%    
PRC | From 2011 to 2013 | Xiaopengzu
     
Income tax expenses      
Preferential income tax rate (as a percent) 7.50%    
Cayman Islands
     
Income tax expenses      
Income (loss) before income tax expense (2,943) (7,962) (17,593)
Hong Kong
     
Income tax expenses      
Tax rate (as a percent) 16.50%    
Withholding tax 0    
Income (loss) before income tax expense $ (480) $ (680) $ (659)