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Geographic Information (Details) (USD $)
3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Sep. 30, 2011
Geographic Information          
Net sales $ 15,252,218 $ 14,280,558 $ 44,356,495 $ 38,079,563  
Long-lived assets 11,874,770   11,874,770   12,052,685
United States
         
Geographic Information          
Net sales 5,634,000 4,389,000 16,242,000 13,450,000  
Long-lived assets 8,779,000   8,779,000   8,762,000
United Kingdom
         
Geographic Information          
Net sales 5,335,000 4,708,000 15,355,000 13,319,000  
Long-lived assets 1,322,000   1,322,000   1,326,000
The Netherlands
         
Geographic Information          
Net sales 2,158,000 2,586,000 6,480,000 4,893,000  
Long-lived assets 1,774,000   1,774,000   1,965,000
Europe and Middle East
         
Geographic Information          
Net sales 1,866,000 2,245,000 5,574,000 5,648,000  
Rest of world
         
Geographic Information          
Net sales $ 259,000 $ 353,000 $ 705,000 $ 770,000