Stock options Option activity (Tables)

12 Months Ended

Jan. 31, 2013

Option activity [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		2012	2011
1.	Risk-free interest rate	.74%-3.57%	1.54%-5.13%
2.	Expected volatility	53.90%-66.82%	51.72%-66.82%
3.	Expected life in years	4.9 to 5.7	4.9 to 5.7
4.	Dividend yield	—	—

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Options		Weighted average exercise price	Weighted average remaining contractual term	Aggregate intrinsic value
Outstanding at January 31, 2011	777		$11.88	6.9	$2,241
Granted	155		7.68
Exercised	(61	)	3.42		240
Expired or forfeited	(28	)	19.29
Outstanding at January 31, 2012	843		11.48	6.9	430
Options exercisable at January 31, 2012	470		$14.37	5.7	217
Granted	173		6.78
Exercised	(11	)	3.10		46
Expired or forfeited	(36	)	10.47
Outstanding at January 31, 2013	969		10.77	6.6	40
Options exercisable at January 31, 2013	586		$13.30	5.3	$37