Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 4,632,000	$ 3,408,000	$ 5,980,000	$ 5,171,000
Other comprehensive income (loss) :
Pension adjustments, net of tax	321,000	1,202,000	963,000	2,006,000
Comprehensive income (loss)	$ 4,953,000	$ 4,610,000	$ 6,943,000	$ 7,177,000