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Inventories
3 Months Ended
Jul. 31, 2014
Inventory Disclosure [Abstract]  
Inventories

(5) Inventories

 

Inventories are valued at the lower of cost or market, with costs determined by the first-in, first-out method. Inventories at July 31, 2014 and April 30, 2014 consist of the following categories:

 

   July 31,
2014
   April 30,
2014
 
Raw materials  $1,007,359   $1,576,238 
Work in process   80,052    63,631 
Finished goods   933,341    651,169 
   $2,020,752   $2,291,038