XML 42 R29.htm IDEA: XBRL DOCUMENT v3.19.1
Inventories (Tables)
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventories

Inventories consisted of the following at December 31, 2018 and 2017:

 

    2018     2017  
             
Finished goods   $ 4,135,424     $ 4,611,973  
Spare parts     285,575       187,158  
Reserves for inventory obsolescence     (206,683 )     (172,562 )
                 
Inventories, net   $ 4,214,316     $ 4,626,569