Shareholders' Equity - Private Placement Securities Purchase Agreement (Details) - USD ($)	3 Months Ended
	Jan. 28, 2017	Oct. 29, 2016
Securities Purchase Agreements [Line Items]
Shares of common stock sold		5,952,381
Price per share of common stock		$ 1.68
Warrant exercise period		5 years
Warrants issued and outstanding, shares		2,976,190
Warrant exercise price per share		$ 2.90
Proceeds from securities issuance		$ 10,000,000
Securities issuance costs		$ 852,000
Option indexed to issuers equity, strike price, number of days used for volume weighted average price per share		5 days
Portion of option securities issued in the form of common stock upon exercise		66.60%
Portion of option securities issued in the form of warrants upon exercise		33.30%
Option Warrants exercise price premium, percentage		50.00%
Option Warrants exercise period		5 years
Limitation on size of offering, percent of common stock		19.99%
Days to file shelf registration statement with SEC after closing date		30 days
Days after closing date to have shelf registration statement declared effective by SEC		90 days
Days after closing date to have shelf registration statement declared effective by SEC in event of full review		120 days
Maximum [Member]
Securities Purchase Agreements [Line Items]
Warrants, Dates from which warrants exercisable		Sep. 19, 2021
Option exercise period		6 months
Minimum [Member]
Securities Purchase Agreements [Line Items]
Warrants, Dates from which warrants exercisable		Mar. 19, 2017
Option exercise period		30 days
Fourth Quarter Fiscal 2016 Option Exercises [Member]
Securities Purchase Agreements [Line Items]
Shares of common stock sold	1,646,350
Warrant exercise period	5 years
Warrants issued and outstanding, shares	823,175
Proceeds from securities issuance	$ 2,500,000
Securities issuance costs	$ 49,000
Fourth Quarter Fiscal 2016 Option Exercises [Member] | Maximum [Member]
Securities Purchase Agreements [Line Items]
Price per share of common stock	$ 1.94
Warrant exercise price per share	$ 3.00
Class of Warrant or Right, Date of Expiration of Warrants or Rights Exercisable	Jan. 23, 2022
Fourth Quarter Fiscal 2016 Option Exercises [Member] | Minimum [Member]
Securities Purchase Agreements [Line Items]
Price per share of common stock	$ 1.20
Warrant exercise price per share	$ 1.76
Class of Warrant or Right, Date of Expiration of Warrants or Rights Exercisable	Nov. 10, 2021