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Acquisition - Honeywell Asset Purchase and License Agreement - Additional Information (Detail)			3 Months Ended			6 Months Ended
	Jul. 28, 2018 USD ($)	Sep. 28, 2017 USD ($) Aircraft	Jul. 28, 2018 USD ($) $ / shares	Apr. 28, 2018 USD ($) $ / shares	Jul. 29, 2017 $ / shares	Jul. 28, 2018 USD ($) $ / shares	Jul. 29, 2017 $ / shares	Jan. 31, 2018 USD ($)
Business Acquisition [Line Items]
Initial upfront payment in cash		$ 14,600,000				$ 400,000
Current Portion of Royalty Obligation	$ 1,625,000		$ 1,625,000			1,625,000		$ 1,625,000
Royalty obligation reported as long-term liability	10,901,000		10,901,000			10,901,000		11,760,000
Current Liability -Excess Royalty Payment Due	1,377,000		$ 1,377,000			$ 1,377,000		$ 615,000
Net Income Per Common Share-Diluted | $ / shares			$ 0.17		$ 0.11	$ 0.29	$ 0.17
Honeywell Asset Purchase and License Agreement [Member]
Business Acquisition [Line Items]
Number of aircraft families | Aircraft		2
Initial upfront payment in cash						$ 400,000
Minimum royalty payment term		10 years
Minimum royalty payments	$ 15,000,000		$ 15,000,000			15,000,000
Present value factor	2.80%
Current Portion of Royalty Obligation	$ 1,600,000		1,600,000			1,600,000
Royalty obligation reported as long-term liability	10,900,000		10,900,000			10,900,000
Excess royalty expense			500,000			800,000
Current Liability -Excess Royalty Payment Due	$ 1,400,000		$ 1,400,000			$ 1,400,000
Increase in operating income				$ 400,000
Increase in operating income net of tax				$ 300,000
Net Income Per Common Share-Diluted | $ / shares				$ 0.05
Internal rate of return		21.00%
Amortization period of intangibles		10 years
Honeywell Asset Purchase and License Agreement [Member] | Minimum [Member] | Intangible Assets [Member]
Business Acquisition [Line Items]
Fair value assumptions, Annual earnings projections		$ 3,900,000
Honeywell Asset Purchase and License Agreement [Member] | Maximum [Member] | Intangible Assets [Member]
Business Acquisition [Line Items]
Fair value assumptions, Annual earnings projections		5,400,000
Honeywell Asset Purchase and License Agreement [Member] | Amended Credit Agreement with Bank Of America [Member] | Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Initial upfront payment in cash		$ 14,600,000
Transition Services Agreement [Member]
Business Acquisition [Line Items]
Increase in operating income				$ 1,000,000
Increase in operating income net of tax				$ 800,000
Net Income Per Common Share-Diluted | $ / shares				$ 0.12

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