Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss attributable to common shareholders	$ (3,635)	$ (5,000)	$ (6,521)	$ (11,290)
Change in cumulative translation adjustment for sale of foreign entity	0	0	(331)	0
Other changes in cumulative translation adjustment	(41)	(142)	(160)	(379)
Comprehensive loss attributable to common shareholders	$ (3,676)	$ (5,142)	$ (7,012)	$ (11,669)