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4. Revenue Recognition (Tables)
3 Months Ended
Mar. 31, 2019
Revenue Recognition Tables Abstract  
Disaggregation of Revenue

Sales of products for the three month periods ended March 31, 2019 and 2018, were as follows:

 

    Three Months Ended  
    March 31,  
    2019     2018  
Antimony   $ 1,705,823     $ 1,681,812  
Zeolite     726,015       690,707  
Precious metals     24,527       60,410  
    $ 2,456,365     $ 2,432,929  

  

The following is sales information by geographic area based on the location of customers for the three month periods ended March 31, 2019 and 2018:

 

    Three Months Ended  
    March 31,  
    2019     2018  
United States   $ 2,108,569     $ 2,247,691  
Canada     187,257       185,238  
Mexico     160,539       -  
    $ 2,456,365     $ 2,432,929  

 

Sales of products to significant customers

Sales of products to significant customers were as follows for the three month periods ended March 31, 2019 and 2018:

 

Sales to Three    For the Period Ended  
Largest Customers  

March 31,

2019

   

March 31,

2018

 
Kohler Corporation   $ 458,094     $ 316,772  
Ampacet Corporation     -       184,142  
East Penn Manufacturing     157,328       -  
Mexichem Speciality Compounds     684,011       728,578  
    $ 1,299,433     $ 1,229,492  
% of Total Revenues     52.90 %     50.50 %

 

Accounts receivable from largest customers were as follows at March 31, 2019 and December 31, 2018:

 

Three Largest            
Accounts Receivable  

March 31,

2019

   

December 31,

2018

 
DanaMart   $ -     $ 143,890  
Axens North America Inc.     64,500       34,912  
Earth Innovations Inc.     -       35,967  
Commerce Industrial Chemical     36,652       -  
Nutreco Canada Inc.     27,736       -  
    $ 128,888     $ 214,769  
% of Total Receivables     38.50 %     49.00 %