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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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