Computation of Earnings Per Share - Computation of Basic and Diluted Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 27, 2021		Mar. 28, 2021		Dec. 27, 2020		Sep. 27, 2020		Jun. 28, 2020		Mar. 29, 2020		Dec. 29, 2019		Sep. 29, 2019		Jun. 27, 2021	Jun. 28, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income (loss)	$ 13,419	[1]	$ 4,758	[1]	$ 7,464	[1]	$ 3,432	[1]	$ (20,247)	[2]	$ (41,111)	[2]	$ 409	[2]	$ 3,712	[2]	$ 29,073	$ (57,237)	$ 2,456
Weighted average common shares outstanding (in shares)																	18,472,000	18,475,000	18,395,000
Basic	$ 0.73	[3]	$ 0.26	[3]	$ 0.40	[3]	$ 0.19	[3]	$ (1.10)	[3]	$ (2.23)	[3]	$ 0.02	[3]	$ 0.20	[3]	$ 1.57	$ (3.10)	$ 0.13
Net potential common share equivalents																	384,000		300,000
Adjusted weighted average common shares outstanding (in shares)																	18,856,000	18,475,000	18,695,000
Diluted	$ 0.70	[3]	$ 0.25	[3]	$ 0.40	[3]	$ 0.18	[3]	$ (1.10)	[3]	$ (2.23)	[3]	$ 0.02	[3]	$ 0.20	[3]	$ 1.54	$ (3.10)	$ 0.13
Excluded from the calculation of common share equivalents:
Anti-dilutive common share equivalents (in shares)																	497,000	401,000	314,000
Unvested stock options that vest upon achievement of certain market conditions (in shares)																	333	333

[1] Net income for the fiscal quarter ended September 27, 2020 includes adverse demand pressures from the COVID-19 pandemic. Net income for the fiscal quarter ended June 27, 2021 includes a recovery of non-income taxes in Brazil due to the favorable conclusion of litigation related to excess social program taxes for multiple prior years.

[2] Net loss for the fiscal quarter ended March 29, 2020 includes the impairment charge for PAL of $45,194.  Net loss for the fiscal quarter ended June 28, 2020 includes the adverse impact of the COVID-19 pandemic and severance charges for involuntary terminations.

[3] Income (loss) per share is computed independently for each of the periods presented.  The sum of the income (loss) per share amounts for the fiscal quarters may not equal the total for the fiscal year.