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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2015
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)   3 - 8
Motor vehicles   5
Furniture, fixtures and equipment   3-8
Schedule of earnings per share
   

Three-Month Period Ended

March 31,

      2015       2014  
Numerator                
Net income   $ 5,315,271     $ 4,286,338  
                 
Denominator                
Basic: Weighted-average common shares outstanding during the period      42,680,899       38,598,424  
Add: Dilutive effect of stock options     796,502       679,533  
Diluted     43,477,401       39,277,957  
                 
Net income per share                
Basic   $ 0.12     $ 0.11  
Diluted   $ 0.12     $ 0.11