Convertible Debt - Additional Information (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Sep. 26, 2016 shares	Aug. 31, 2014 USD ($) shares	Dec. 31, 2016 shares	Dec. 31, 2014 USD ($) shares	Feb. 28, 2014 USD ($)
Debt Instrument [Line Items]
Conversion price, percentage			90
Conversion description			In the event of a qualified financing, at the sole election of the Company, the entire principal balance and a minimum of one year of accrued interest converted into shares of Mezzanine A Preferred Stock at 90% of the per share price of the Mezzanine A Preferred Stock issued.
Debt converted, principal and interest		$ 3,782		$ 3,782
Shares issued upon debt conversion | shares	8,776,269
Mezzanine A Convertible Preferred Stock
Debt Instrument [Line Items]
Shares issued upon debt conversion | shares		306,484	(3,677,622)	306,484
Convertible Notes
Debt Instrument [Line Items]
Convertible note					$ 3,502
Interest rate					8.00%
Principal and Interest due date			Aug. 24, 2015
Principal and Interest due date description			Principal and interest was due on the earlier of August 24, 2015 or the occurrence of a liquidating event.
Interest expense related to convertible notes		$ 420		$ 280
Convertible Notes | Minimum
Debt Instrument [Line Items]
Interest accrual period			1 year
Convertible Notes | Preferred Shareholders
Debt Instrument [Line Items]
Convertible note					$ 2,836
Convertible Notes | Board Member Share Holdings
Debt Instrument [Line Items]
Convertible note					$ 300