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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 |

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