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Inventories
12 Months Ended
Dec. 31, 2014
Inventory Disclosure [Abstract]  
Inventories

3.  Inventories

   December 31,
Inventories consisted of:  2014  2013
Finished goods  $28,712,961   $26,004,042 
Work in process   522,377    186,507 
Materials and supplies   4,435,860    2,028,333 
   $33,671,198   $28,218,883 

 

Inventories are stated net of valuation allowances for slow moving and obsolete inventory of $825,087 as of December 31, 2014 and $557,070 as of December 31, 2013.