Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	6,842,978	1,590,948
Common stock, shares outstanding	6,842,978	1,590,948
Preferred stock, par value (usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	50,000,000	10,000,000
Preferred stock, shares issued	2,750,000	0
Preferred stock, shares outstanding	2,750,000	0
Preferred stock liquidation preference	$ 27,548	$ 0