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Radyne Acquisition-Related Restructuring Plan - Details of Future Cash Payments (Details) - USD ($)
Jan. 31, 2017
Jul. 31, 2016
Aug. 01, 2008
Jul. 31, 2008
Radyne Acquisition Related Restructuring Plan [Abstract]        
Future lease payments to be made $ 2,652,000 $ 3,327,000 $ 2,100,000 $ 2,100,000
Interest expense to be accreted in future periods 294,000      
Total remaining payments $ 2,946,000