Note 6 (Details Textual) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 30, 2017	Dec. 30, 2016	Sep. 29, 2018	Sep. 29, 2018	Sep. 30, 2017
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 379,000				$ 374,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	244,000				$ 239,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ (20,900,000)
Income (Loss) from Remeasurement of Deferred Tax Liabilities, Per Share	$ 1.11
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ (2,000,000)
Income (Loss) from Reduction in Income Taxes, Per Share	$ 0.11
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 1,200,000
Income (Loss) from Repatriation of Foreign Earnings, Per Share	$ 0.06
Effective Income Tax Rate Reconciliation, Percent	28.60%	34.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					35.00%
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount				$ 21,700,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%