Quarterly report pursuant to Section 13 or 15(d)

Computation of Basic and Diluted Net Loss Per Share (Detail)

v3.10.0.1
Computation of Basic and Diluted Net Loss Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Numerator:          
Net loss $ (2,198) $ (727) $ (4,388) $ (5,682) $ (53,907)
Denominator:          
Weighted-average common shares (in thousands) - basic and diluted 22,232 20,761 22,027 20,680  
Loss per share, basic and diluted $ (0.10) $ (0.03) $ (0.20) $ (0.27)