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Note 8 - Product Warranties (Details) - Changes in Product Warranty Liability (USD $)
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9 Months Ended | |
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Jun. 29, 2013
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Jun. 30, 2012
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| Changes in Product Warranty Liability [Abstract] | ||
| Accrued liability at beginning of period | $ 378,643 | $ 480,000 |
| Increase (Decrease) in reserve | 98,276 | (135,664) |
| Increase in reserve as a result of MCHP asset acquisition | 39,000 | |
| Expenses | (124,887) | (27,336) |
| Accrued liability at end of period | $ 352,032 | $ 356,000 |