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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands | Sep. 28, 2018 | Sep. 29, 2017
--- | --- | ---
Property, plant and equipment, accumulated depreciation | $ 131,322 | $ 132,567
Preferred stock, shares issued (shares) | 0 | 0
Treasury stock, shares (shares) | 67,655 | 67,137
Class A |  |
Common stock, shares issued (shares) | 8,787,360 | 8,784,513
Common stock, shares outstanding (shares) | 8,787,360 | 8,784,513
Class B |  |
Common stock, shares issued (shares) | 1,211,686 | 1,211,686
Common stock, shares outstanding (shares) | 1,211,686 | 1,211,686

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