Supplemental Balance Sheet Disclosures (Details 3) (USD $)	3 Months Ended	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Sep. 30, 2012
Accrued expenses
Warranty	$ 689,173	$ 689,173
Salary, benefits and payroll taxes	491,787	491,787	531,862
Professional fees	413,711	413,711	330,858
Income taxes payable	399,870	399,870	132,980
Materials on order	26,583	26,583	43,374
Other	1,660,358	1,660,358	834,239
Total	3,681,482	3,681,482	2,723,812
Estimated liability related to legal matter	640,000	640,000
Warranty cost and accrual information
Warranty accrual, beginning of period	744,722	850,499
Accrued expense for the period	(17,485)	(42,302)
Warranty cost incurred for the period	(38,064)	(119,024)
Warranty accrual, end of period	$ 689,173	$ 689,173