Accrued Liabilities and Other Liabilities-Noncurrent (Details 1) (USD $)	3 Months Ended	6 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Changes in the warranty reserve
Beginning balance	$ 190,593	$ 323,476	$ 204,313	$ 272,261
Warranty provision	15,913	(104,317)	6,468	(40,007)
Warranty settlements	(1,501)	(1,919)	(5,776)	(15,014)
Short-term warranty reserve	173,788	163,694	173,788	163,694	154,069
Long-term warranty reserve	31,217	53,546	31,217	53,546	50,244
Ending balance	$ 205,005	$ 217,240	$ 205,005	$ 217,240

Amount at end of the reporting period of the aggregate extended product warranty liability that is expected to be paid after one year from the balance sheet date or normal operating cycle, if longer. Does not include the balance for the standard product warranty liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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