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Inventories
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories

3.  Inventories

   December 31,
Inventories consisted of:  2015  2014
Finished goods  $29,802,745   $28,712,961 
Work in process   169,540    522,377 
Materials and supplies   5,535,306    4,435,860 
   $35,507,591   $33,671,198 

 

Inventories are stated net of valuation allowances for slow moving and obsolete inventory of $698,592 as of December 31, 2015 and $825,087 as of December 31, 2014.