Note K - Stockholders' Equity - Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 27, 2020	Dec. 27, 2019	Sep. 27, 2019	Mar. 29, 2019	Dec. 28, 2018	Sep. 28, 2018	Mar. 27, 2020	Mar. 29, 2019
Balance	$ 169,485	$ 173,363	$ 182,818	$ 181,843	$ 178,459	$ 143,616	$ 182,818	$ 143,616
Translation adjustment during the quarter	(1,266)	1,647	(2,996)	(869)	(1,786)	(561)	(2,615)	(3,217)
Balance	144,035	169,485	173,363	186,642	181,843	178,459	144,035	186,642
Release stranded tax effects
Translation adjustment during the quarter	(1,266)	1,647	(2,996)	(869)	(1,786)	(561)	(2,615)	(3,217)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	3,072	1,425	4,439	4,776	6,549	7,085	4,439	7,085
Translation adjustment during the quarter	(1,257)	1,647	(3,014)	(885)	(1,773)	(536)
Amounts reclassified from accumulated other comprehensive income
Net current period other comprehensive (loss) income	(1,257)	1,647	(3,014)	(885)	(1,773)	(536)
Balance	1,815	3,072	1,425	3,891	4,776	6,549	1,815	3,891
Release stranded tax effects
Translation adjustment during the quarter	(1,257)	1,647	(3,014)	(885)	(1,773)	(536)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Balance	(40,796)	(41,344)	(41,901)	(36,831)	(37,309)	(30,877)	(41,901)	(30,877)
Translation adjustment during the quarter
Amounts reclassified from accumulated other comprehensive income	1,593	548	557	478	478	471
Net current period other comprehensive (loss) income	1,593	548	557	478	478	(6,432)
Balance	(39,203)	(40,796)	(41,344)	(36,353)	(36,831)	(37,309)	(39,203)	$ (36,353)
Release stranded tax effects						(6,903)
Translation adjustment during the quarter
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Balance	(506)	(652)	(509)				(509)
Translation adjustment during the quarter
Amounts reclassified from accumulated other comprehensive income	(582)	146	(143)
Net current period other comprehensive (loss) income	(582)	146	(143)
Balance	(1,088)	(506)	(652)				$ (1,088)
Translation adjustment during the quarter