Quantitative Information Associated With Fair Value Measurement of Level 3 Financial Instrument (Detail) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Oct. 31, 2014	Apr. 05, 2015
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate	4.70%
Avionics Interface Technologies, LLC
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration	1,800
Significant Unobservable Inputs (Level 3) | Income Approach Valuation Technique | ZTEC Instruments, Inc.
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration		1,600
Significant Unobservable Inputs (Level 3) | Income Approach Valuation Technique | Avionics Interface Technologies, LLC
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Contingent consideration		1,750
Revenue Earnout | ZTEC Instruments, Inc.
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Target achievement, probability		0.00%
Revenue Earnout | Avionics Interface Technologies, LLC
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Target achievement, probability		90.00%
Customer Orders | ZTEC Instruments, Inc.
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Target achievement, probability		40.00%
Discount rate		5.20%
Customer Orders | Avionics Interface Technologies, LLC
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Discount rate		4.70%