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Stock-based compensation (Tables)

6 Months Ended

Jul. 31, 2012

Stock-based compensation [Abstract]

Stock-based compensation expense [Table Text Block]

	Three Months Ended July 31,		Six Months Ended July 31,
	2012	2011	2012	2011
Stock-based compensation expense	$174	$69	$260	$297

Fair value assumptions [Table Text Block]

	Six Months Ended July 31,
Fair value assumptions	2012	2011
Expected volatility	57.02% - 66.82%	51.72% - 66.82%
Risk free interest rate	.74% - 3.57%	1.54% - 5.13%
Dividend yield	none	none
Expected life	4.9 - 5.7 years	4.9 - 7.0 years

Option activity [Table Text Block]

Option activity	Options	Weighted Average Exercise Price Per Share			Weighted Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Outstanding on February 1, 2012	843		$11.48		6.9		$430
Granted	158	6.88
Exercised	(11)	2.94				45
Expired or forfeited	(26)	10.25
Outstanding end of period	964	10.85			7.0	225
Exercisable end of period	584		$13.37		5.8		$137
Weighted-average fair value of options granted during first six months of 2012			$3.37

Nonvested option activity [Table Text Block]

Unvested option activity	Unvested Options Outstanding	Weighted Average Price Per Share			Aggregate Intrinsic Value
Outstanding on February 1, 2012	373		$7.84			$212
Granted	158	6.88
Vested	(142)
Expired or forfeited	(9)	7.08
Outstanding end of period	380		$6.98			$89

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- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F



Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 6: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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- Definition

Tabular disclosure of the changes in outstanding nonvested shares.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

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