Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4,549	$ 849	$ (1,730)
Other comprehensive income (loss) :
Pension adjustments	5,904	(6,254)	2,006
Comprehensive income (loss)	$ 10,453	$ (5,405)	$ 276