Capitalization - Liquidation Event (Details) - Preferred Stock	Dec. 31, 2016 $ / shares
Class C Preferred Stock
Preferred stock
Liquidation preference per share (in dollars per share)	$ 4.2299
Class D Preferred Stock
Preferred stock
Liquidation preference per share (in dollars per share)	21.0145
Class B-1 Preferred Stock
Preferred stock
Liquidation preference per share (in dollars per share)	2.471
Class B-2 Preferred Stock
Preferred stock
Liquidation preference per share (in dollars per share)	$ 2.572