Quarterly report pursuant to Section 13 or 15(d)

Condensed Financial Statements - Summary of Certain Statements of Operations Amounts (Detail)

v3.20.1
Condensed Financial Statements - Summary of Certain Statements of Operations Amounts (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense $ 1,271 $ 1,590
Research and Development [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense 319 241
Selling and Supply Chain [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense (251) 63
General and Administrative Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock compensation expense $ 1,203 $ 1,286