Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Additional Information (Detail)

v3.8.0.1
Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Finite Lived Intangible Assets [Line Items]        
Intangible amortization expense $ 60 $ 59 $ 118 $ 117
Customer Relationships [Member]        
Finite Lived Intangible Assets [Line Items]        
Intangible amortization expense 45 $ 45 90 $ 90
Future amortization expenses, 2018 90   90  
Future amortization expenses, 2019 180   180  
Future amortization expenses, 2020 180   180  
Future amortization expenses, 2021 180   180  
Future amortization expenses, 2022 $ 180   $ 180