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Note 5 - Product Warranties - Changes in Accrual for Product Warranties (Details) (USD $)
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3 Months Ended | |
|---|---|---|
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Jan. 31, 2015
|
Jan. 31, 2014
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|
| Balance at beginning of period | $ 100,000 | $ 190,000 |
| Liabilities accrued for warranties issued during the period | 86,639 | 104,777 |
| Warranty claims and costs paid during the period | (34,079) | (50,539) |
| Changes in liability for pre-existing warranties during the period | (47,560) | (84,238) |
| Balance at end of period | $ 105,000 | $ 160,000 |