Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Detail)

v3.19.2
Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Detail)
Jun. 30, 2019
shares
Class Of Stock [Line Items]  
Total reserved shares of common stock 14,536,178
2014 Equity Incentive Plan  
Class Of Stock [Line Items]  
Total reserved shares of common stock 12,135,316
2018 Inducement Plan  
Class Of Stock [Line Items]  
Total reserved shares of common stock 1,223,621
2014 Employee Stock Purchase Plan  
Class Of Stock [Line Items]  
Total reserved shares of common stock 1,067,575
Options Granted Outside the Equity Plans  
Class Of Stock [Line Items]  
Total reserved shares of common stock 109,666