Interest expense, net (Tables)

6 Months Ended

Jul. 31, 2016

Interest expense, net [Abstract]

Interest income and interest expense [Table Text Block]

	Three Months Ended July 31,						Six Months Ended July 31,
	2016			2015			2016			2015
Interest expense		$139			$172			$392			$367
Interest income	(42		)	(10		)	(69		)	(284		)
Interest expense, net		$97			$162			$323			$83