Computation of Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Jun. 28, 2020		Mar. 29, 2020		Dec. 29, 2019		Sep. 29, 2019		Jun. 30, 2019		Mar. 31, 2019		Dec. 30, 2018		Sep. 30, 2018		Jun. 28, 2020	Jun. 30, 2019	Jun. 24, 2018
Earnings Per Share [Abstract]
Net (loss) income	$ (20,247)	[1]	$ (41,111)	[1]	$ 409	[1]	$ 3,712	[1]	$ 1,002	[2]	$ (1,529)	[2]	$ 1,171	[2]	$ 1,812	[2]	$ (57,237)	$ 2,456	$ 31,702
Weighted average common shares outstanding (in shares)																	18,475,000	18,395,000	18,294,000
Basic	$ (1.10)	[3]	$ (2.23)	[3]	$ 0.02	[3]	$ 0.20	[3]	$ 0.05	[3]	$ (0.08)	[3]	$ 0.06	[3]	$ 0.10	[3]	$ (3.10)	$ 0.13	$ 1.73
Net potential common share equivalents																		300,000	343,000
Adjusted weighted average common shares outstanding (in shares)																	18,475,000	18,695,000	18,637,000
Diluted	$ (1.10)	[3]	$ (2.23)	[3]	$ 0.02	[3]	$ 0.20	[3]	$ 0.05	[3]	$ (0.08)	[3]	$ 0.06	[3]	$ 0.10	[3]	$ (3.10)	$ 0.13	$ 1.70
Excluded from the calculation of common share equivalents:
Anti-dilutive common share equivalents (in shares)																	401,000	314,000	118,000
Unvested stock options that vest upon achievement of certain market conditions (in shares)																	333

[1] Net loss for the fiscal quarter 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.

[2] Net income for the fiscal quarter ended June 30, 2019 includes severance charges for involuntary terminations.

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