XML 86 R75.htm IDEA: XBRL DOCUMENT v3.19.1
Income Taxes - Additional Information (Detail)
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Income Tax Disclosure [Abstract]            
Federal income tax rate 21.00% 28.00% 28.00% 21.00% 28.00% 35.00%