Major Customers (Details) (USD $)	12 Months Ended
	Sep. 30, 2012 Mg	Sep. 30, 2011 Mg	Sep. 30, 2010 Mg
Corning Incorporated
Deliveries, MCT	2,538,000	2,811,000	2,596,000
Deliveries, % of Total	30.00%	29.00%	29.00%
Revenue	$ 1,142,000	$ 1,263,000	$ 1,149,000
Revenue, % of Total	6.00%	6.00%	5.00%
NYSEG
Deliveries, MCT	2,675,000	3,374,000	3,156,000
Deliveries, % of Total	32.00%	35.00%	35.00%
Revenue	348,000	342,000	335,000
Revenue, % of Total	2.00%	1.00%	1.00%
BEGWS
Deliveries, MCT	505,000	639,000	623,000
Deliveries, % of Total	6.00%	7.00%	7.00%
Revenue	$ 1,479,000	$ 2,037,000	$ 2,164,000
Revenue, % of Total	8.00%	9.00%	10.00%