Common Stock (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands							1 Months Ended			9 Months Ended
	Nov. 09, 2017	Sep. 27, 2017	Apr. 14, 2017	Feb. 28, 2017	Feb. 16, 2017	Jan. 19, 2017	Sep. 30, 2017	Feb. 28, 2017	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 25, 2017
Net proceeds from direct offering						$ 8,900	$ 2,000	$ 4,500	$ 8,900
Number of common stock sold						1,399,140
Sale of stock price per share						$ 2.01
Pre-funded warrants to purchase of common stock, shares						3,426,731
Pre-funded common stock purchase warrants price, per share						$ 2.00
Warrant exercise price per share						$ 0.01
Number of common stock issued value										$ 15,182
Proceeds from common stock										$ 16,395	$ 12,511
Investor [Member]
Number of common stock issued				150,000
Number of common stock issued value				$ 300
Share issued price per share				$ 2.00				$ 2.00
ATM Offering [Member]
Net proceeds from direct offering			$ 30,000
Number of common stock sold	673,853
Commission percentage			2.50%
Proceeds from common stock	$ 1,100
Available for future sales	28,900
Aspire Capital Fund LLC [Member]
Net proceeds from direct offering					$ 4,500
Number of common stock sold					2,100,000
Sale of stock price per share					$ 1.58
Pre-funded warrants to purchase of common stock, shares					748,101
Pre-funded common stock purchase warrants price, per share					$ 1.57
Warrant exercise price per share					$ 0.01
Warrants expiration term					3 years
Aspire Capital Fund LLC [Member] | Common Stock Purchase Agreement [Member]
Number of common stock issued value	20,000
Share issued price per share												$ 1.38
Proceeds from common stock		$ 2,000
Available for future sales	$ 22,000
Number of common stock purchased		1,428,571