Quarterly report pursuant to Section 13 or 15(d)

Income Taxes - Additional Information (Detail)

v3.10.0.1
Income Taxes - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Mar. 31, 2018
Income Taxes [Line Items]      
Liability unrecognized tax benefits $ 0   $ 0
Percentage of corporate income tax rate 21.00% 35.00%  
Income tax benefit from remeasurement of deferred tax assets and liabilities     971,000
One-time transition tax on accumulated foreign earnings     $ 185,000
Incremental tax on GILTI estimated amount $ 30,000    
Earliest Tax Year [Member] | Federal Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2015    
Earliest Tax Year [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2013    
Earliest Tax Year [Member] | International Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2015    
Latest Tax Year [Member] | Federal Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2017    
Latest Tax Year [Member] | State Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2017    
Latest Tax Year [Member] | International Tax Jurisdictions [Member]      
Income Taxes [Line Items]      
Open tax year 2017