Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Effective Income Tax Rate (Detail)

v3.20.1
Income Taxes - Summary of Effective Income Tax Rate (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax [Line Items]      
Impact of U.S. tax rate, Percentage (0.07%) (0.11%) (0.80%)
Impact of valuation allowance, Percentage (12.91%) (11.42%) (13.64%)
Research and development tax credit, Percentage 0.23% 0.45% 0.76%
Adjustments for current tax of prior periods, Percentage (0.24%) 0.00% 0.00%
Other, net, Percentage 0.06% (2.03%) (0.36%)
Effective tax rate, Percentage (0.43%) (0.61%) (1.54%)
Statutory rate, Amount $ (12,836) $ (9,573) $ (3,620)
Impact of U.S. tax rate, Amount 72 81 232
Impact of valuation allowance, Amount 13,258 8,749 3,949
Research and development tax credit, Amount (232) (341) (220)
Adjustments for current tax of prior periods, Amount 241    
Other, net, Amount (59) 1,557 103
Income Tax Provision $ 444 $ 472 $ 444
Ireland      
Income Tax [Line Items]      
Statutory rate, Percentage 12.50% 12.50% 12.50%