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Stock-Based Compensation - Schedule of Information Related to Stock Option Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Total fair value of stock options exercised	$ 1,912	$ 454	$ 212
Total fair value of stock options vested	$ 803	$ 1,275	$ 2,021

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- Definition

Share based compensation arrangement by share based payment award options exercises in period fair value.

+ References

No definition available.

+ Details

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- References

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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