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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($)
$ in Thousands
Mar. 27, 2020
Sep. 27, 2019
Mar. 29, 2019
Property, plant and equipment, accumulated depreciation $ 149,083 $ 143,028 $ 136,834
Class A      
Common stock, shares issued (shares) 8,871,007 8,834,169 8,838,459
Common stock, shares outstanding (shares) 8,871,007 8,834,169 8,838,459
Treasury stock, shares (shares) 36,354 29,225 29,225
Class B      
Common stock, shares issued (shares) 1,211,602 1,211,602 1,211,602
Common stock, shares outstanding (shares) 1,211,602 1,211,602 1,211,602