Significant accounting policies Net loss per common share (Tables)

12 Months Ended

Jan. 31, 2017

Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Basic weighted average number of common shares outstanding	2016		2015
Basic weighted average number of common shares outstanding	7,488		7,280
Dilutive effect of stock options, deferred stock and restricted stock units	—		91
Weighted average number of common shares outstanding assuming full dilution	7,488		7,371
Weighted average number of stock options not included in the computation of diluted EPS of common stock because the option exercise prices exceeded the average market prices	306		710
Canceled options during the year	(159	)	(77	)
Stock options with an exercise price below the average stock price	218		10