Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss per Share (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Numerator:                      
Net loss allocated to common stock—basic                 $ (72,548) $ (27,557) $ (26,671)
Adjustment for revaluation and extinguishment of common stock warrants                 (422)    
Net loss allocated to common stock—diluted                 $ (72,970) $ (27,557) $ (26,671)
Denominator:                      
Weighted average number of common stock shares outstanding - basic                 57,808,254 34,903,960 23,447,003
Dilutive securities:                      
Common stock warrants                 30,045    
Weighted average number of common stock shares outstanding - diluted                 57,838,299 34,903,960 23,447,003
Net loss per share—basic $ (0.32) $ (0.31) $ (0.30) $ (0.32) $ (0.11) $ (0.21) $ (0.31) $ (0.20) $ (1.25) $ (0.79) $ (1.14)
Net loss per share—diluted $ (0.32) $ (0.34) $ (0.30) $ (0.32) $ (0.11) $ (0.21) $ (0.31) $ (0.20) $ (1.26) $ (0.79) $ (1.14)