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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 9 Months Ended
Sep. 30, 2013
Accounting Policies [Abstract]  
Schedule of property plant and equipment useful life
   

Useful life

(in years)

  
Buildings (including salt pans)     8 - 20  
Plant and machinery (including protective shells, transmission channels and ducts)     5 - 8  
Motor vehicles     5  
Furniture, fixtures and equipment     8  
Schedule of computation of basic and diluted earnings per share
   

Three-Month Period Ended

September 30,

    

Nine-Month Period Ended

September 30,

    2013     2012       2013       2012  
Numerator                            
Net income   $ 8,109,729     $ 4,113,216     $ 15,348,593     $ 13,088,997  
                                 
Denominator                                
Basic: Weighted-average common shares outstanding during the period     38,368,267       34,560,743       38,368,267       34,560,743  
Add: Dilutive effect of stock options     594,887       139,246       317,343       396,476  
Diluted     38,963,154       34,699,989       38,685,610       34,957,219  
                                 
Net income per share                                
Basic   $ 0.21     $ 0.12     $ 0.40     $ 0.38  
Diluted   $ 0.21     $ 0.12     $ 0.40     $ 0.37