Earnings (Loss) Per Share - Summary of Basic and Diluted Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Apr. 28, 2019	Jan. 27, 2019	Apr. 29, 2018	Jan. 28, 2018	Apr. 28, 2019	Apr. 29, 2018
Numerator
Net loss	$ (5,165)	$ (3,215)	$ (7,687)	$ (10,694)	$ (8,380)	$ (18,381)
Denominator
Basic weighted average number of shares (shares)	21,082		21,032		21,081	21,030
Dilutive weighted average number of shares (shares)	21,082		21,032		21,081	21,030
Net loss per share:
Basic (usd per share)	$ (0.24)		$ (0.37)		$ (0.40)	$ (0.87)
Diluted (usd per share)	$ (0.24)		$ (0.37)		$ (0.40)	$ (0.87)