Earnings Per Share - Summary of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 1,286	$ 14,601	$ 244	$ 12,708
Weighted-average common shares outstanding	27,027,731	26,451,107	26,784,404	26,449,751
Weighted-average dilutive securities, warrants	0	150,292	0	178,290
Weighted-average shares and dilutive potential common shares	27,080,015	26,720,110	26,980,480	26,788,306
Basic earnings per share	$ 0.05	$ 0.55	$ 0.01	$ 0.48
Diluted earnings per share	$ 0.05	$ 0.55	$ 0.01	$ 0.47
Restricted Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted-average dilutive securities	50,769	94	135,792	29,149
Options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Weighted-average dilutive securities	1,515	118,617	60,284	131,116