Geographic Area Data (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Geographic Area Data
Net sales	$ 16,897,000	$ 15,385,000	$ 15,428,000	$ 13,973,000	$ 15,019,000	$ 14,413,000	$ 12,942,000	$ 10,999,000	$ 61,683,201	$ 53,372,698	$ 41,547,788
Long-lived assets	11,862,072				12,052,685				11,862,072	12,052,685
United States
Geographic Area Data
Net sales									22,922,000	18,717,000	16,888,000
Long-lived assets	8,689,000				8,762,000				8,689,000	8,762,000
United Kingdom
Geographic Area Data
Net sales									21,166,000	18,296,000	15,120,000
Long-lived assets	1,363,000				1,326,000				1,363,000	1,326,000
The Netherlands
Geographic Area Data
Net sales									8,646,000	7,345,000	432,000
Long-lived assets	1,810,000				1,965,000				1,810,000	1,965,000
Europe and Middle East
Geographic Area Data
Net sales									7,901,000	7,976,000	8,139,000
Rest of world
Geographic Area Data
Net sales									$ 1,048,000	$ 1,039,000	$ 969,000