Interest expense, net (Tables)

9 Months Ended

Oct. 31, 2014

Interest expense, net [Abstract]

Interest income and interest expense [Table Text Block]

	Three Months Ended October 31,						Nine Months Ended October 31,
	2014			2013			2014			2013
Interest expense		$432			$409			$1,175			$1,504
Interest income	(139		)	(133		)	(382		)	(422		)
Interest expense, net		$293			$276			$793			$1,082