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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Schedule of property plant and equipment
    As of December 31,  
    2012     2011  
At cost:            
Mineral rights   $ 6,334,277     $ 6,318,750  
Buildings     50,905,337       40,974,528  
Plant and machinery     166,121,329       136,862,383  
Motor vehicles     9,140       7,024  
Furniture, fixtures and office equipment     4,777,044       4,057,356  
Total     228,147,127       188,220,041  
Less: accumulated depreciation and amortization     (62,204,585 )     (41,019,301 )
Net book value   $ 165,942,542     $ 147,200,740  
Schedule of fair value measurements
        Fair Value Measurements Using    

 

 

 

Description

  Year ended December 31, 2011  

Quoted Prices in Active Markets for Identical Assets

(Level 1)

 

 

Significant Other Observable Inputs

(Level 2)

 

Significant Unobservable Inputs

(Level 3)

 

 

 

 

Total Gains (Losses)

Owned long-lived assets (plant and machinery) held and used   $ 7,616,259   $ -   $ -   $ 7,616,259   $ (1,805,598)
Long-lived assets (plant and machinery) held under capital lease and used   $ 2,368,008   $ -   $ 2,368,008   -   $ (683,046)
                    $ (2,488,644)
Schedule of computation of basic and diluted earnings per share
    Years ended December 31, 
    2012   2011   
Numerator              
Net income   $ 14,995,503     $ 30,952,760    
                   
Denominator                  

Basic: Weighted-average common shares

outstanding during the year

    34,706,356       34,660,866    
Add: Dilutive effect of stock options     361,594       12,749    
Diluted     35,067,950       34,673,615    
                   
Net income per share                  
Basic   $ 0.43     $ 0.89    
Diluted   $ 0.43     $ 0.89