Annual report pursuant to Section 13 and 15(d)

Goodwill - Additional Information (Detail)

v3.19.1
Goodwill - Additional Information (Detail) - USD ($)
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Loss on impairment of goodwill $ 0 $ 0