Stock options Option activity (Tables)

12 Months Ended

Jan. 31, 2017

Option activity [Abstract]

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

		2016		2015
1.	Risk-free interest rate	1.2	%	1.7	%
2.	Expected volatility	43.2	%	43.4	%
3.	Expected life in years	5.0		5.0
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 on January 31, 2015	764		$11.45	5.7	$0
Granted	51		6.38
Exercised	(18	)	6.48		3
Expired or forfeited	(77	)	9.93
Outstanding on January 31, 2016	720		11.38	5.1	34
Options exercisable on January 31, 2016	554		$11.94	4.2	30
Granted	22		7.33
Exercised	(59	)	6.70		68
Expired or forfeited	(159	)	11.98
Outstanding on January 31, 2017	524		11.55	4.5	534
Options exercisable on January 31, 2017	450		$11.92	3.9	$465