Stock Compensation Plans - Schedule of Transactions Involving Outstanding Stock Options and Non-Vested Restricted Stock and Restricted Stock Unit Awards Under 2006 Plan (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 29, 2017	Oct. 30, 2016	Nov. 01, 2015	Nov. 02, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	1,921,036	980,414
Number of shares, Outstanding Ending balance (shares)	2,499,923	1,921,036	980,414
Employee Stock Option
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Weighted average exercise price, Outstanding balance (USD per share)	$ 5.52
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	229,735	50,159
Number of shares, Outstanding Ending balance (shares)	338,968	229,735	50,159
2015 Equity Incentive Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	978,406	0
Number of shares, Granted (shares)	851,488	981,154
Number of shares, Forfeited (shares)	(54,270)	(2,748)
Number of shares, Vested (shares)	0	0
Number of shares, Outstanding Ending balance (shares)	1,775,624	978,406	0
Number of shares, Unvested (shares)	1,400,714
Number of shares, Exercisable (shares)	374,910
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Weighted average exercise price, Outstanding balance (USD per share)		$ 0.00
Weighted average exercise price, Granted (USD per share)	$ 4.46	6.48
Weighted average exercise price, Forfeited (USD per share)	6.14	$ 6.06
Weighted average exercise price, Outstanding balance (USD per share)			$ 0.00
Weighted average exercise price, Unvested (USD per share)	5.18
Weighted average exercise price, Exercisable (USD per share)	$ 6.79
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average contractual life, Outstanding	9 years 11 days	9 years 6 months 4 days	0 years
Weighted average contractual life, Unvested	9 years 2 months 9 days
Weighted average contractual life, Exercisable	8 years 5 months 5 days
Aggregate Intrinsic Value, Outstanding	$ 2,881	$ 242	$ 0
Aggregate Intrinsic Value, Expected to vest	1,796
Aggregate Intrinsic Value, Exercisable	$ 1,085
2015 Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	185,952	0
Number of shares, Granted (shares)	248,915	261,721
Number of shares, Forfeited (shares)	(10,862)	(550)
Number of shares, Vested (shares)	(137,816)	(75,219)
Number of shares, Deferred (shares)	36,885
Number of shares, Outstanding Ending balance (shares)	323,074	185,952	0
Number of shares, Unvested (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, Outstanding (USD per share)	$ 7.13	$ 0.00
Weighted average grant date fair value, Granted (USD per share)	4.43	6.41
Weighted average grant date fair value, Forfeited (USD per share)	6.14	6.06
Weighted average grant date fair value, Vested (USD per share)	5.36	6.06
Weighted average grant date fair value, Outstanding (USD per share)	5.09	$ 7.13	$ 0.00
Weighted average grant date fair value, Deferred (USD per share)	4.35
Weighted average grant date fair value, Unvested (USD per share)
2006 Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	942,629	980,414	764,150
Number of shares, Granted (shares)		189,897	393,528
Number of shares, Exercised (shares)	(300)	(11,682)	(83,264)
Number of shares, Forfeited (shares)	(218,031)	(216,000)	(94,000)
Number of shares, Vested (shares)	0	0	0
Number of shares, Outstanding Ending balance (shares)	724,298	942,629	980,414	764,150
Number of shares, Unvested (shares)	76,889
Number of shares, Exercisable (shares)	647,409
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, End of Period [Abstract]
Weighted average exercise price, Outstanding balance (USD per share)	$ 8.97	$ 9.14	$ 9.22
Weighted average exercise price, Granted (USD per share)		7.18	9.21
Weighted average exercise price, Exercised (USD per share)	6.39	6.39	6.39
Weighted average exercise price, Forfeited (USD per share)	11.26	8.34	12.49
Weighted average exercise price, Outstanding balance (USD per share)	8.28	$ 8.97	$ 9.14	$ 9.22
Weighted average exercise price, Unvested (USD per share)	7.42
Weighted average exercise price, Exercisable (USD per share)	$ 8.38
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average contractual life, Outstanding	6 years 1 month 24 days	6 years 10 months 28 days	5 years 3 months 23 days	5 years 5 months 5 days
Weighted average contractual life, Unvested	9 years 3 months 15 days
Weighted average contractual life, Exercisable	6 years 10 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 3,170	$ 1	$ 727	$ 776
Aggregate Intrinsic Value, Expected to vest	271
Aggregate Intrinsic Value, Exercisable	$ 2,899
2006 Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of shares, Outstanding Beginning balance (shares)	43,781	50,159	23,334
Number of shares, Granted (shares)		38,314	170,979
Number of shares, Forfeited (shares)	(12,426)	0	0
Number of shares, Vested (shares)	(15,463)	(44,692)	(144,154)
Number of shares, Outstanding Ending balance (shares)	15,892	43,781	50,159	23,334
Number of shares, Unvested (shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, Outstanding (USD per share)	$ 7.35	$ 9.17	$ 7.68
Weighted average grant date fair value, Granted (USD per share)		7.18	9.32
Weighted average grant date fair value, Forfeited (USD per share)	7.15	0.00	0.00
Weighted average grant date fair value, Vested (USD per share)	7.42	9.24	9.11
Weighted average grant date fair value, Outstanding (USD per share)	7.44	$ 7.35	$ 9.17	$ 7.68
Weighted average grant date fair value, Unvested (USD per share)