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1. NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
9 Months Ended
Sep. 30, 2014
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 fair value measurements
    Three-Month Period Ended September 30,     Nine-Month Period Ended September 30,
    2014     2013       2014       2013    
Numerator                              
Net income   $ 5,038,403     $ 8,109,729     $ 14,989,553     $ 15,348,593    
                                   
Denominator                                  
Basic: Weighted-average common shares outstanding during the period     38,726,415       38,368,267       38,684,220       38,368,267    
Add: Dilutive effect of stock options     570,919       594,887       621,755       317,343    
Diluted     39,297,334       38,963,154       39,305,975       38,685,610    
                                   
Net income per share                                  
Basic   $ 0.13     $ 0.21     $ 0.39     $ 0.40    
Diluted   $ 0.13     $ 0.21     $ 0.38     $ 0.40