Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Loss per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Numerator:        
Net loss allocated to common stock-basic $ (24,038) $ (17,531) $ (47,113) $ (34,536)
Adjustments for revaluation and extinguishment of common stock warrants   (198)    
Net loss allocated to common stock-diluted $ (24,038) $ (17,729) $ (47,113) $ (34,536)
Denominator:        
Weighted average number of common stock shares outstanding - basic 68,697,735 58,833,647 65,312,988 56,307,236
Dilutive securities:        
Common stock warrants   72,251    
Weighted average number of common stock shares outstanding - diluted 68,697,735 58,905,898 65,312,988 56,307,236
Net loss per share - basic: $ (0.35) $ (0.30) $ (0.72) $ (0.61)
Net loss per share - diluted: $ (0.35) $ (0.30) $ (0.72) $ (0.61)