Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.4.0.3
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Income Taxes [Line Items]    
Valuation allowance $ 985 $ 952
Liability unrecognized tax benefits $ 0 $ 0
Earliest Tax Year [Member] | Federal Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2013  
Earliest Tax Year [Member] | State Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2011  
Earliest Tax Year [Member] | International Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2012  
Latest Tax Year [Member] | Federal Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2015  
Latest Tax Year [Member] | State Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2015  
Latest Tax Year [Member] | International Tax Jurisdictions [Member]    
Income Taxes [Line Items]    
Open tax year 2015  
Investment Tax Credit Carryforward [Member]    
Income Taxes [Line Items]    
Deferred income taxes include the impact of state investment tax credits $ 311  
State investment tax credits with an unlimited carryforward period $ 674  
Investment Tax Credit Carryforward [Member] | Maximum [Member]    
Income Taxes [Line Items]    
Expiration date of state investment tax credits Mar. 31, 2030  
Investment Tax Credit Carryforward [Member] | Minimum [Member]    
Income Taxes [Line Items]    
Expiration date of state investment tax credits Mar. 31, 2016