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Nature of Operations, Segment Reporting and Geographical Information - Summary of Other Information by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Segment Reporting Information [Line Items]
Assets	$ 118,983	$ 122,313
Depreciation and Amortization	6,152	3,994	$ 2,431
Capital Expenditures	2,645	2,204	1,238
Operating Segments [Member] | Product Identification [Member]
Segment Reporting Information [Line Items]
Assets	49,091	49,832
Depreciation and Amortization	1,888	1,536	885
Capital Expenditures	1,935	1,497	767
Operating Segments [Member] | T&M [Member]
Segment Reporting Information [Line Items]
Assets	62,250	60,579
Depreciation and Amortization	4,264	2,458	1,546
Capital Expenditures	710	707	$ 471
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Assets	$ 7,642	$ 11,902

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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