Shareholders' Equity Shareholders' Equity - Securities Purchase Agreements (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 10, 2016	Oct. 29, 2016
Securities Purchase Agreements [Line Items]
Shares of common stock sold		5,952,381
Shares Issued, Price Per Share		$ 1.68
Warrants issued and outstanding, Shares		2,976,190
Warrant exercise price per share		$ 2.90
Proceeds from securities issuance		$ 10,000
Securities issuance costs		$ 868
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
Subsequent Event [Member]
Securities Purchase Agreements [Line Items]
Shares of common stock sold	667,746
Shares Issued, Price Per Share	$ 1.94
Proceeds from securities issuance	$ 1,300
November 10, 2016 Option Exercise [Member] | Subsequent Event [Member]
Securities Purchase Agreements [Line Items]
Warrant exercise price per share	$ 3.00
Warrants issued, shares	333,873
Maximum [Member]
Securities Purchase Agreements [Line Items]
Warrant, Dates from which warrants exercisable		Sep. 19, 2021
Option exercise period		6 months
Maximum [Member] | November 10, 2016 Option Exercise [Member] | Subsequent Event [Member]
Securities Purchase Agreements [Line Items]
Warrant, Dates from which warrants exercisable	Nov. 10, 2021
Minimum [Member]
Securities Purchase Agreements [Line Items]
Warrant, Dates from which warrants exercisable		Mar. 19, 2017
Option exercise period		30 days