Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Preferred stock, par value	$ 0.0001
Preferred stock, shares authorized	10,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	5,951,487
Common stock, shares issued	8,356,659	273,993
Common stock, shares outstanding	8,356,659	273,993
Convertible Preferred Stock [Member]
Preferred stock, par value		$ 0.0001
Preferred stock, shares authorized	0	2,694,579
Preferred stock, shares issued	0	2,609,102
Preferred stock, shares outstanding	0	2,609,102
Preferred stock, liquidation value	$ 0	$ 22,269