Common Stock (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands				1 Months Ended		3 Months Ended
	Feb. 28, 2017	Feb. 16, 2017	Jan. 19, 2017	Feb. 28, 2017	Jan. 31, 2017	Mar. 31, 2017
Net proceeds from direct offering			$ 8,900	$ 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						$ 13,388
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
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