Reverse Merger - Summary of Regado Purchase Price (Parenthetical) (Detail)		12 Months Ended
	May. 04, 2015 $ / shares shares	Dec. 31, 2015 shares	Dec. 31, 2014 shares
Business Acquisition [Line Items]
Common stock, shares outstanding		18,815,689	403,539
Vested equity awards		551,363
Regado [Member]
Business Acquisition [Line Items]
Common stock, shares outstanding	3,734,536
Closing price per share | $ / shares	$ 10.89
Reverse stock split		one for nine
Reverse stock split ratio	0.1111
Converted preferred stock shares	222,222
Vested equity awards	551,363