Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Summary of Intangible Assets (Detail)

v3.8.0.1
Intangible Assets - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Finite-lived Intangible Assets [Roll Forward]      
Intangible assets, beginning balance $ 2,647 $ 12,490 $ 19,967
Amortization of intangibles (1,416) (7,087) (7,477)
Adjustment/writeoff   (2,756)  
Intangible assets, ending balance $ 1,231 $ 2,647 $ 12,490