Annual report pursuant to Section 13 and 15(d)

Common Stock - Computation of Basic and Diluted Net Loss Attributable to Common Shareholders Per Share (Detail)

v3.3.1.900
Common Stock - Computation of Basic and Diluted Net Loss Attributable to Common Shareholders Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Numerator                      
Net loss $ (1,722) $ (4,550) $ (6,010) $ (4,517) $ (5,682) $ (4,907) $ (7,015) $ (8,636) $ (16,801) $ (26,240) $ (31,849)
Denominator                      
Weighted average number of common shares outstanding                 26,147,344 18,098,799 14,683,389
Basic and diluted net loss per common share $ (0.06) $ (0.16) $ (0.26) $ (0.20) $ (0.26) $ (0.23) $ (0.47) $ (0.59) $ (0.64) $ (1.45) $ (2.17)