Financial Instruments (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Disclosure Text Block Supplement [Abstract]
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (23,000)	$ (140,000)	$ (29,000)	$ (366,000)