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

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 June 30,     Six-Month Period Ended June 30,
    2013     2012       2013       2012    
Numerator                              
Net income   $ 5,355,899     $ 5,688,674     $ 7,238,864     $ 8,975,781    
                                   
Denominator                                  
Basic: Weighted-average common shares outstanding during the period     38,367,471       34,560,743       38,367,471       34,560,743    
Add: Dilutive effect of stock options     223,656       -       178,571       651    
Diluted     38,591,127       34,560,743       38,546,042       34,561,394    
                                   
Net income per share                                  
Basic   $ 0.14     $ 0.16     $ 0.19     $ 0.26    
Diluted   $ 0.14     $ 0.16     $ 0.19     $ 0.26