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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES (Additional Information) (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Apr. 14, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Common Stock Outstanding [Member]
Dec. 31, 2014
Scenario, Forecast [Member]
Basis of presentation                
Average selling price ("ASP") of polysilicon 21   18     60   22
Average production cost of polysilicon     11         11
Operating loss     $ (200,631,180) $ (88,517,894) $ 50,752,147      
Cash flow from operations     (16,525,817) (10,307,234) 44,857,910      
Working capital     (207,979,447)          
Cash and cash equivalents     7,831,084 6,679,024 92,697,098 203,635,798    
Short-term bank borrowings     68,821,014 51,273,360        
Proceeds from short-term bank debt   11,200,000            
Proceeds from bank acceptance note credit facility   4,800,000            
Current portion of long-term debt     50,049,843 69,006,400        
Restricted cash                
Restricted cash     8,826,110 10,649,745        
Inventories                
Inventory write-down     29,905,734 14,821,620 14,252,701      
Prepaid land use rights                
Lease Expenses     781,706 958,558 166,355      
Impairment of long-lived assets                
Long-lived asset impairment     158,424,827 42,754,481 38,512,376      
Impairment charges included in loss from discontinued operations         3,844,799      
Revenue recognition                
Revenue of other products     32,278,700 19,862,424 36,916,531      
Shipping and handling                
Shipping and handling costs     1,901,384 1,033,808 1,215,110      
Government subsidies                
Unrestricted cash government subsidies     5,249,788 9,250,296 11,484,768      
Government grants related to assets     1,172,160 1,383,487 25,895,226      
Government grants recognized as an offset to depreciation expense     1,454,125 764,528 42,047      
Deferred government subsidies     26,954,700 26,472,135 25,853,179      
Foreign currency translation                
Aggregate amount of cash and cash equivalents and restricted cash denominated in RMB     11,436,370 11,589,709        
Noncontrolling interest                
Noncontrolling interest        138,772,130        
Treasury Stock                
Share repurchase program, authorized amount       5,000,000        
Number of shares repurchased             2,836,670  
Value of shares repurchased       $ 500,724     $ 283