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Acquisition - Purchase Price of Acquisition Allocated on Basis of Fair Value (Detail) - USD ($)
$ in Thousands
Oct. 31, 2015
Jun. 19, 2015
Jan. 31, 2015
Business Acquisition [Line Items]      
Goodwill $ 4,522   $ 991
RITEC [Member]      
Business Acquisition [Line Items]      
Accounts Receivable   $ 50  
Identifiable Intangible Assets $ 3,780 3,780  
Goodwill   3,530  
Total Purchase Price   $ 7,360