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Stock-based compensation Restricted stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 31, 2015	Jan. 31, 2015
Outstanding	77	33
weighted average, outstanding	$ 8.60	$ 11.53
Aggregate Intrinsic Value, Outstanding	$ 436	$ 186
Granted	92
Weighted Average Grant Date Fair Value	$ 6.38
Issued	(48)

X

- Definition

share based compensation, other than options, weighted average, outstanding

+ References

No definition available.

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X

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(2)(iii)(1)



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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB



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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



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- Definition

Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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- Definition

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



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