Share-Based Compensation Plans - Narrative (Details) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Apr. 28, 2019 USD ($) multiplier shares	Apr. 29, 2018 USD ($)	Apr. 28, 2019 USD ($) day multiplier shares	Apr. 29, 2018 USD ($)	Oct. 29, 2017 USD ($) $ / shares	Oct. 28, 2018 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 0.6	$ 0.5	$ 0.7	$ 1.0
Number of shares, exercised (shares) | shares			200,000
Issued in period (shares) | shares			0
Total unrecognized compensation cost	1.2		$ 1.2
Weighted average vesting period			1 year 8 months 19 days
Compensation cost not yet recognized, expected in 2019	0.4		$ 0.4
Compensation cost not yet recognized, expected in 2020	0.6		0.6
Compensation cost not yet recognized, expected in 2021	0.2		$ 0.2
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of grants in period	$ 1.0
Equity instruments other than options, average stock price prior to end of vesting period, number of trading days | day			20
Maximum multiplier for closing stock price on grant date | multiplier	2		2
Outstanding (shares) | shares	176,989		176,989			276,396
Performance Share Units | Vesting Period One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Performance Share Units | Vesting Period Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			2 years
Performance Share Units | Vesting Period Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Performance Share Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, payout percentage			0.00%
Performance Share Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity instruments other than options, payout percentage			200.00%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of grants in period	$ 1.4
Award vesting period			3 years
Maximum multiplier for closing stock price on grant date | multiplier	2		2
Outstanding (shares) | shares	420,845		420,845			582,831
Phantom Share Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of grants in period	$ 0.1				$ 0.3
Award vesting period					3 years
Weighted average grant date fair value (in dollars per share) | $ / shares					$ 4.35
Outstanding (shares) | shares	12,022		12,022
Restricted Stock Units (RSUs), Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years