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Inventories
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Notes to Financial Statements    
Inventories

 (3) Inventories

 

Inventories consist of :  

March 31,

2013

   

December 31,

2012

 
Materials   $ 554,732     $ 720,113  
Work in process     87,144       ––  

Finished goods (including $362,500 and $489,400 held by customers at

  March 31, 2013 and December 31, 2012, respectively)

    2,029,506       1,910,273  
Total   $ 2,671,382     $ 2,630,386  

Inventories, net of reserves consist of the following at December 31:

 

    2011     2012  
Materials   $ 815,357     $ 720,113  
Work in process     25,641       ––  
Finished goods (including $822,000 and $489,400 held by customers at December 31, 2011 and 2012, respectively)     1,881,785       1,910,273  
Total   $ 2,722,783     $ 2,630,386  

 

The Company reviews inventory for obsolete and slow moving products each quarter and make provisions based on our estimate of the probability that the material will not be consumed or that it will be sold below cost. The Company recorded a $13.8 thousand increase and $155.2 thousand decrease in the provision for slow moving and obsolete inventory during the years ended December 31, 2011 and 2012, respectively.