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Note 6 - Accrued Liabilities And Other Liabilities - Noncurrent (Details) - Changes in Warranty Reserve (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2012
Changes in Warranty Reserve [Abstract]
Beginning balance	$ 205,005	$ 217,240	$ 204,313	$ 272,261
Warranty provision	(7,302)	8,122	(834)	(31,885)
Warranty settlements	(5,809)	(4,185)	(11,585)	(19,199)
Ending balance	191,894	221,177	191,894	221,177
Short-term warranty reserve	162,268	169,907	162,268	169,907	154,069
Long-term warranty reserve	$ 29,626	$ 51,270	$ 29,626	$ 51,270	$ 50,244

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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.

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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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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. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

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