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Acquisition - Purchase Price of Acquisition Allocated on Basis of Fair Value (Detail) - USD ($)
$ in Thousands
Apr. 30, 2016
Jan. 31, 2016
Jun. 19, 2015
Business Acquisition [Line Items]      
Goodwill $ 4,521 $ 4,521  
RITEC [Member]      
Business Acquisition [Line Items]      
Accounts Receivable     $ 50
Identifiable Intangible Assets $ 3,780   3,780
Goodwill     3,530
Total Purchase Price     $ 7,360