Stockholders' Equity - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016 shares
Stockholders' Equity Note [Abstract]
Common stock reserved for issuance upon exercise of outstanding common stock options and vesting of restricted stock units	3,183,945
Common stock reserved for future grants of stock options and restricted stock units	361,733
Outstanding warrants to purchase common stock	0
Number of warrants expired	24,380