Note 8 - Product Warranties - Changes In Product Warranty Liability (Details) - USD ($) |
6 Months Ended | |
|---|---|---|
Apr. 01, 2017 |
Apr. 02, 2016 |
|
| Accrued liability at beginning of period | $ 306,488 | $ 291,980 |
| Increase in reserve | 83,629 | 144,857 |
| Repairs and replacements | (77,370) | (122,763) |
| Accrued liability at end of period | $ 312,747 | $ 314,074 |