Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.20.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Line Items]    
Valuation allowance $ 53,222 $ 46,967
Net operating loss carryforwards federal 169,500  
Net operating loss carryforwards state $ 111,300  
Operating loss carryforwards, expiration period 2037  
Unremitted earnings of foreign subsidiaries $ 600  
Current income related to the GILTI 100  
Federal    
Income Tax Disclosure [Line Items]    
Research and development tax credit carryforwards $ 2,200  
Research and development tax credit carryforwards, expiration period 2037  
State | Indefinite Life    
Income Tax Disclosure [Line Items]    
Research and development tax credit carryforwards $ 2,100