Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Jun. 24, 2018	$ 389,781	$ 1,835	$ 56,726	$ 371,753	$ (40,533)
Balance (in shares) at Jun. 24, 2018		18,353,000
Options exercised	273	$ 2	271
Options exercised (in shares)		22,000
Conversion of restricted stock units		$ 4	(4)
Conversion of restricted stock units (in shares)		41,000
Stock-based compensation	2,472	$ 1	2,471
Stock-based compensation (in shares)		10,000
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions	(377)	$ (1)	(376)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions (in shares)		(15,000)
Other comprehensive loss, net of tax	(2,607)				(2,607)
Adoption of the new revenue recognition guidance | ASU No. 2014-09 [Member]	459			459
Net income (loss)	1,454			1,454
Balance at Mar. 31, 2019	391,455	$ 1,841	59,088	373,666	(43,140)
Balance (in shares) at Mar. 31, 2019		18,411,000
Balance at Dec. 30, 2018	393,927	$ 1,838	59,619	375,195	(42,725)
Balance (in shares) at Dec. 30, 2018		18,383,000
Options exercised	29		29
Options exercised (in shares)		6,000
Conversion of restricted stock units		$ 3	(3)
Conversion of restricted stock units (in shares)		24,000
Stock-based compensation	(313)	$ 1	(314)
Stock-based compensation (in shares)		9,000
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions	(244)	$ (1)	(243)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions (in shares)		(11,000)
Other comprehensive loss, net of tax	(415)				(415)
Net income (loss)	(1,529)			(1,529)
Balance at Mar. 31, 2019	391,455	$ 1,841	59,088	373,666	(43,140)
Balance (in shares) at Mar. 31, 2019		18,411,000
Balance at Jun. 30, 2019	$ 392,845	$ 1,846	59,560	374,668	(43,229)
Balance (in shares) at Jun. 30, 2019	18,462,296	18,462,000
Options exercised	$ 29	$ 1	28
Options exercised (in shares)		10,000
Conversion of restricted stock units		$ 8	(8)
Conversion of restricted stock units (in shares)		76,000
Stock-based compensation	2,299	$ 1	2,298
Stock-based compensation (in shares)		4,000
Common stock repurchased and retired under publicly announced program	$ (1,994)	$ (8)	(279)	(1,707)
Common stock repurchased and retired under publicly announced program (in shares)	(84,000)	(84,000)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions	$ (522)	$ (3)	(519)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions (in shares)		(22,000)
Other comprehensive loss, net of tax	(21,838)				(21,838)
Net income (loss)	(36,990)			(36,990)
Balance at Mar. 29, 2020	$ 333,829	$ 1,845	61,080	335,971	(65,067)
Balance (in shares) at Mar. 29, 2020	18,446,436	18,446,000
Balance at Dec. 29, 2019	$ 395,479	$ 1,851	61,187	378,789	(46,348)
Balance (in shares) at Dec. 29, 2019		18,505,000
Conversion of restricted stock units		$ 4	(4)
Conversion of restricted stock units (in shares)		42,000
Stock-based compensation	596		596
Common stock repurchased and retired under publicly announced program	(1,994)	$ (8)	(279)	(1,707)
Common stock repurchased and retired under publicly announced program (in shares)		(84,000)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions	(422)	$ (2)	(420)
Common stock withheld in satisfaction of tax withholding obligations under net share settle transactions (in shares)		(17,000)
Other comprehensive loss, net of tax	(18,719)				(18,719)
Net income (loss)	(41,111)			(41,111)
Balance at Mar. 29, 2020	$ 333,829	$ 1,845	$ 61,080	$ 335,971	$ (65,067)
Balance (in shares) at Mar. 29, 2020	18,446,436	18,446,000