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Note 6 (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2018	Mar. 25, 2017	Mar. 31, 2018	Mar. 25, 2017	Sep. 29, 2018	Sep. 30, 2017
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 384,000		$ 384,000			$ 374,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	249,000		249,000			$ 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	$ 1,900,000		$ (3,900,000)
Income (Loss) from Reduction in Income Taxes, Per Share	$ 0.10		$ 0.21
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, Total	28.70%	35.40%	28.60%	34.80%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						35.00%
Provisional Income Tax Benefit	$ 1,900,000		$ 23,600,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%

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