Stockholders' Equity (Deficit) - Additional Information (Detail)			1 Months Ended	12 Months Ended
	Jun. 03, 2015 USD ($)	May. 04, 2015 USD ($) $ / shares shares	Aug. 31, 2015 USD ($) shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 shares
Class Of Stock [Line Items]
Common stock, shares issued | shares				18,815,689	403,539
Issuance costs				$ 642,000
Cowen and Company, LLC [Member]
Class Of Stock [Line Items]
Percentage of commission paid to gross sales price	3.00%
Shares, Issued | shares			1,141,970
Proceeds from issuance of common stock			$ 15,100,000
Issuance costs			$ 700,000
Cowen and Company, LLC [Member] | Maximum [Member]
Class Of Stock [Line Items]
Aggregate offering price	$ 40,000,000
Private Placement [Member]
Class Of Stock [Line Items]
Issuance costs				$ 174,000
Regado [Member]
Class Of Stock [Line Items]
Debt conversion, converted instrument, shares issued				1.4302
Reverse stock split				one for nine
2015 Merger Agreement [Member]
Class Of Stock [Line Items]
Proceeds from issuance of private placement		$ 27,000,000
2015 Merger Agreement [Member] | Related Party [Member]
Class Of Stock [Line Items]
Proceeds from issuance of private placement		$ 15,500,000
2015 Merger Agreement [Member] | Private Placement [Member]
Class Of Stock [Line Items]
Common stock, shares issued | shares		2,542,365
Shares issued, price per share | $ / shares		$ 10.62
Reverse stock split				one for nine