Financing Activities - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Jun. 21, 2016	Jun. 13, 2016	Jun. 30, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Sale of common stock price per share		$ 14.00
Net proceeds from initial public offering		$ 77.6
Common stock, shares outstanding			27,521,070	21,570,395
IPO [Member]
Class of Stock [Line Items]
Common stock, shares issued	400,000	5,500,000