Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.19.2
Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Income Tax Disclosure [Abstract]        
Liability for unrecognized tax benefit, including related estimates of penalties and interest $ 0 $ 0 $ 0 $ 0
Income tax provision (benefit) $ 28,000 $ 10,000 $ 42,000 $ 42,000
Projected annual effective tax rate 0.50% (10.00%) 0.30% 0.80%
Statutory tax rate     21.00%