Supplemental Balance Sheet Disclosures (Details 3) (USD $)	3 Months Ended	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2013	Sep. 30, 2012
Accrued expenses
Warranty	$ 744,722	$ 744,722
Salary, benefits and payroll taxes	598,501	598,501	531,862
Professional fees	411,091	411,091	330,858
Income taxes payable	326,568	326,568	132,980
Materials on order	125,266	125,266	43,374
Other	607,794	607,794	834,239
Total	2,813,942	2,813,942	2,723,812
Warranty cost and accrual information
Warranty accrual, beginning of period	799,748	850,499
Accrued expense for the period	(11,886)	(24,817)
Warranty cost incurred for the period	(43,140)	(80,960)
Warranty accrual, end of period	$ 744,722	$ 744,722