Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Components of Intangible Assets (Detail)

v3.8.0.1
Intangible Assets - Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Finite Lived Intangible Assets [Line Items]        
Cost $ 5,826 $ 6,644    
Accumulated Amortization (4,595) (3,997)    
Net 1,231 2,647 $ 12,490 $ 19,967
Software        
Finite Lived Intangible Assets [Line Items]        
Cost 5,826 6,644    
Accumulated Amortization (4,595) (3,997)    
Net $ 1,231 $ 2,647