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Note 6 (Details Textual) - USD ($)
6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Sep. 29, 2018
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 404,000   $ 394,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total $ 269,000   $ 259,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability   $ 20,900,000  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount   $ 1,200,000  
Effective Income Tax Rate Reconciliation, Percent, Total 27.00% 28.70%  
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount $ 900,000