Stock-based compensation (Tables)

9 Months Ended

Oct. 31, 2013

Stock-based compensation [Abstract]

Stock-based compensation expense [Table Text Block]

	Three Months Ended October 31,				Nine Months Ended October 31,
	2013		2012		2013		2012
Stock-based compensation expense		$27		$106		$95		$366

Fair value assumptions [Table Text Block]

	Nine Months Ended October 31,
Fair value assumptions	2013	2012
Expected volatility	49.65% - 65.54%	58.12% - 66.82%
Risk free interest rate	.74% - 2.82%	.74% - 2.82%
Dividend yield	none	none
Expected life	4.9 - 5.7 years	4.9 - 5.7 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 at January 31, 2013	969			$10.77	6.6		$40
Granted	102		10.50
Exercised	(135	)	6.72			506
Expired or forfeited	(55	)	12.64
Outstanding end of period	881		11.25		6.3	2,770
Exercisable end of period	602			$12.67	5.1		$1,748

Nonvested option activity [Table Text Block]

Unvested option activity	Unvested Options Outstanding		Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at January 31, 2013	383			$6.91		$4
Granted	102		10.50
Vested	(181	)
Expired or forfeited	(25	)	6.96
Outstanding end of period	279			$8.18		$1,022