UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - 9 months ended Sep. 30, 2017 - USD ($) $ in Thousands	Total	Common Stock	Preferred stock	2017 Bridge Notes	Senior and Junior Notes	Preferred stock	Preferred stock Preferred stock	Preferred stock Senior and Junior Notes	Common Stock	Common Stock Common Stock	Common Stock 2017 Bridge Notes	Common Stock Senior and Junior Notes	Additional Paid-in Capital	Additional Paid-in Capital Common Stock	Additional Paid-in Capital Preferred stock	Additional Paid-in Capital 2017 Bridge Notes	Additional Paid-in Capital Senior and Junior Notes	Accumulated Deficit
Balance at beginning of period at Dec. 31, 2016	$ (6,460)					$ 8			$ 4				$ 4,376					$ (10,848)
Balance at beginning of period (in shares) at Dec. 31, 2016						780,105			449,175
Increase (Decrease) in Stockholders' Equity
Net loss	(10,719)																	(10,719)
Conversion of warrants into stock			$ 25							$ 20				$ (20)	$ 25
Conversion of warrants into stock (in shares)							8,542			1,958,166
Shares converted, value	0					$ (25)			$ 34				(9)
Conversion of preferred stock into common stock (in shares)		(943,600)				(2,526,425)			3,467,666
Conversion of debt into stock				$ 2,738	$ 4,771			$ 8			$ 6	$ 14				$ 2,732	$ 4,749
Conversion of debt into stock (in shares)								802,920			515,638	1,414,700
Issuance of common stock for consulting services in connection with the merger	2,189								$ 3				2,186
Issuance of common stock for consulting services in connection with the merger (in shares)									321,821
Shares issued in connection with business combination	20,098					$ 8			$ 12				20,078
Shares issued in connection with business combination (in shares)						802,925			1,255,119
Issuance of preferred stock	5,380					$ 1							5,379
Issuance of preferred stock (in shares)						135,574
Issuance of warrants in conjunction with issuance of side agreement	487												487
Beneficial conversion feature on issuance of bridge notes	1,856												1,856
Non-cash stock-based compensation and vesting of restricted units	41								$ 1				40
Non-cash stock-based compensation and vesting of restricted units (in shares)									64,593
Balance at end of period at Sep. 30, 2017	$ 20,406					$ 0			$ 94				$ 41,879					$ (21,567)
Balance at end of period (in shares) at Sep. 30, 2017						3,641			9,446,878