Other intangible assets with definite lives (Tables)

6 Months Ended

Jul. 31, 2014

Other intangible assets with definite lives [Abstract]

Patent amortization expense [Table Text Block]

	Three Months Ended July 31,				Six Months Ended July 31,
	2014		2013		2014		2013
Patent amortization expense		$12		$12		$25		$26