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Income Taxes (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Valuation Allowance, Deferred Tax Asset, Change in Amount $ (132)  
Income tax expense $ 996 $ 226
Effective Income Tax Rate, Continuing Operations 27.70% 1414.10%
Deferred Tax Assets, Valuation Allowance $ 3,180 $ 3,048
Tax Credit Carryforward, Amount 417  
Deferred Tax Assets, Other Tax Carryforwards 58  
Undistributed Earnings of Foreign Subsidiaries 1,100 2,500
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 202  
Accrued penalties and interest 7 18
State    
Valuation Allowance, Deferred Tax Asset, Change in Amount 59  
Operating Loss Carryforwards 400 $ 400
U.K.    
Operating Loss Carryforwards $ 8,500