Annual report pursuant to Section 13 and 15(d)

Income Tax - Additional Information (Details)

v3.19.3.a.u2
Income Tax - Additional Information (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Income Tax Disclosure [Abstract]        
U.S. federal corporate tax rate 35.00% 21.00% 21.00% 24.30%
Unrecognized tax benefits   $ 0 $ 0 $ 0
Amount accrued for payment of interest and penalties   $ 0 $ 0 $ 0