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Note 3 - Inventories (Details) - Change in inventory reserve (USD $)
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12 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2011
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| Change in inventory reserve [Abstract] | |||
| Balance Begin | $ 49,810 | $ 75,952 | $ 15,464 |
| Charged to Costs and Expenses | (6,662) | 128,360 | 177,726 |
| Write-offs | (2,015) | (154,502) | (117,237) |
| Balance End | $ 41,133 | $ 49,810 | $ 75,952 |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Certain changes made in the current period to the value and amount of inventory reported. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
This element represents a sum total of expenses not separately reflected on the income statement for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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