Other intangible assets with definite lives (Tables)

9 Months Ended

Oct. 31, 2014

Other intangible assets with definite lives [Abstract]

Patent amortization expense [Table Text Block]

	Three Months Ended October 31,				Nine Months Ended October 31,
	2014		2013		2014		2013
Patent amortization expense		$13		$12		$38		$38