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12. Significant Customer Concentrations (Tables)
 12 Months Ended
Mar. 31, 2013
Concentration Risk Disclosure [Text Block]  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] The following table presents net sales by U.S. and foreign countries:

   
2013
   
2012
 
United States
 
$
6,893,832
   
$
14,776,451
 
Foreign countries
   
933,426
     
1,732,227
 
Total
 
$
7,827,258
   
$
16,508,678