Geographic Information (Details) (USD $)	3 Months Ended			6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Sep. 30, 2012
Geographic Information
Net sales	$ 16,635,070	$ 15,427,275	$ 12,853,000	$ 33,887,078	$ 29,399,882	$ 23,799,000
Long-lived assets	12,769,153			12,769,153			11,862,072
United States
Geographic Information
Net sales	6,189,000	5,962,000	4,743,000	12,672,000	10,628,000	9,060,000
Long-lived assets	9,576,000			9,576,000			8,689,000
United Kingdom
Geographic Information
Net sales	6,159,000	5,068,000	4,390,000	12,428,000	10,032,000	8,611,000
Long-lived assets	1,412,000			1,412,000			1,363,000
The Netherlands
Geographic Information
Net sales	1,759,000	1,970,000	2,307,000	4,175,000	4,331,000	2,442,000
Long-lived assets	1,781,000			1,781,000			1,810,000
Europe and Middle East
Geographic Information
Net sales	2,245,000	2,205,000	1,253,000	4,036,000	3,933,000	3,269,000
Rest of world
Geographic Information
Net sales	$ 283,000	$ 222,000	$ 160,000	$ 576,000	$ 476,000	$ 417,000