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4. Revenue Recognition (Tables)
3 Months Ended
Mar. 31, 2018
Revenue Recognition Tables  
Disaggregation of Revenue

Sales of products for the thee-month periods ended March 31, 2018 and 2017 were as follows:

 

    Three Months Ended  
    March 31,  
    2018     2017  
Antimony   $ 1,681,812     $ 1,986,507  
Zeolite     690,707       612,012  
Precious metals     60,410       20,811  
    $ 2,432,929     $ 2,619,330  

 

The following is sales information by geographic area based on the location of customers for the three-month periods ended March 31, 2018 and 2017:

 

 

    Three Months Ended  
    March 31,  
    2018     2017  
United States   $ 2,099,521     $ 2,297,055  
Canada     185,238       322,275  
Mexico     148,170       -  
    $ 2,432,929     $ 2,619,330  

 

Sales of products to significant customers

 

Sales to Three    For the Period Ended  
Largest Customers  

March 31,

2018

   

March 31,

2017

 
Kohler Corporation   $ 316,772     $ 445,178  
Ampacet Corporation     184,142       -  
East Penn Manufacturing     -       148,643  
Mexichem Speciality Compounds     728,578       786,425  
    $ 1,229,492     $ 1,380,246  
% of Total Revenues     50.50 %     52.70 %

 

Three Largest            
Accounts Receivable  

March 31,

2018

   

March 31,

2017

 
Kohler Corporation         $ 149,124  
Axens North America Inc.   $ 38,404       -  
Mexichem Speciality Compounds     148,170       135,680  
Teck America     59,110       -  
Nutreco Canada Inc.     -       28,139  
    $ 245,684     $ 312,943  
% of Total Receivables     59.50 %     56.50 %