Equity Financing - Additional Information (Detail) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Equity [Abstract]
Common stock issued | shares	2.1
Common stock average price per share | $ / shares	$ 17.84
Underwriting discount and commission per share | $ / shares	$ 1.60
Gross proceeds from issue of common stock | $	$ 37.5
Offering costs | $	$ 0.2