Stock options Option activity (Tables)

12 Months Ended

Jan. 31, 2016

Option activity [Abstract]

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

		2.015	2.014
1.	Risk-free interest rate	.74%-1.77%	.74%-1.77%
2.	Expected volatility	40.88%-57.02%	40.88%-59.39%
3.	Expected life in years	5.0 to 5.1	4.9 to 5.1
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, 2014	776		$11.69	6.1	$3,859
Granted	97		12.41
Exercised	(45	)	7.27		194
Expired or forfeited	(64	)	18.92
Outstanding at January 31, 2015	764		11.45	5.7	—
Options exercisable at January 31, 2015	532		$12.04	4.5	—
Granted	51		6.38
Exercised	(18	)	6.48		3
Expired or forfeited	(77	)	9.93
Outstanding at January 31, 2016	720		11.38	5.1	34
Options exercisable at January 31, 2016	554		$11.94	4.2	$30