Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015	Jan. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring costs unpaid	$ 0		$ 0
Severance costs incurred	0		0
Receivable from sale of business	103	$ 830	103	$ 830	$ 255
Property, plant and equipment, net	110,706	118,291	110,706	118,291	115,704
Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs unpaid	0	0	0	0
Severance costs incurred	0	111	0	588
Gain (Loss) on Disposition of Assets	161	247	161	611
Receivable from sale of business	103	827	103	827
Cost of Sales [Member] | Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs incurred		14		407
Selling, General and Administrative Expenses [Member] | Applied Technology [Member]
Restructuring Cost and Reserve [Line Items]
Severance costs incurred		97		181
Assets Held-for-sale [Member]
Restructuring Cost and Reserve [Line Items]
Property, plant and equipment, net	$ 0	$ 1,353	$ 0	$ 1,353	$ 800