Cash equivalents maturity period description.

No definition available.

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- Definition

Cash held in foreign bank accounts.

+ References

No definition available.

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- Definition

Compensation expenses of option forfeited for not rendering in requested service.

+ References

No definition available.

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- Definition

Products warranty period.

+ References

No definition available.

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- Definition

Amount after tax, of reclassification from AOCI to retained earnings related to the Tax Cuts and Jobs Act of 2017.

+ References

No definition available.

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- Definition

Summary of significant accounting policies.

+ References

No definition available.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-Subparagraph (b)
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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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-Paragraph 1
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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Jul. 31, 2018	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Highly liquid investments with an original maturity		90 days or less
Cash of held in foreign bank accounts		$ 3,900,000	$ 3,900,000
Net transactional foreign exchange losses		700,000	200,000	$ 200,000
Advertising expense		1,900,000	1,800,000	1,600,000
Impairment charges for long-lived assets		0	0	0
Impairment charges for intangible assets		$ 0	$ 0	$ 0
Number of common equivalent shares		326,275	675,600	459,700
No compensation expense is recognized on forfeited options		$ 0
Reclassification from accumulated other comprehensive income to retained earnings	$ 14,000
Right-of-use assets and lease liabilities relating to operating leases		$ 2,000,000
Maximum [Member] \| Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Summary Of Significant Accounting Policies [Line Items]
Percentage of revenue satisfied for services		9.00%
Maximum [Member] \| Airborne Product [Member]
Summary Of Significant Accounting Policies [Line Items]
Products warranty period		5 years
Minimum [Member] \| Airborne Product [Member]
Summary Of Significant Accounting Policies [Line Items]
Products warranty period		4 years
Land Improvements [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		20 years
Land Improvements [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		10 years
Building And Leasehold Improvements [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		45 years
Building And Leasehold Improvements [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		10 years
Machinery and Equipment [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		10 years
Machinery and Equipment [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		3 years
Computer Equipment And Software [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		10 years
Computer Equipment And Software [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives of the assets		3 years