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Stock-Based Compensation - Employee Stock Purchase Plan Activity (Details) - Employee Stock Purchase Plan - $ / shares	Jul. 31, 2017	Jan. 31, 2017
Stock-Based Compensation
Shares issued (in shares)	219,586	246,237
Fair market value at purchase date (in dollars per share)	$ 9.29	$ 11.20

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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- Definition

Represents the purchase date fair market value of shares issued under employee stock purchase plan.

+ References

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