Note 2 - Cash, Cash Equivalents, and Marketable Securities (Tables)

3 Months Ended

Apr. 30, 2014

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Investments [Table Text Block]

April 30, 2014
	Cost		Unrealized Gains		Unrealized Losses Less Than 12 Months		Unrealized Losses 12 Months or Longer		Estimated Fair Value
Cash and cash equivalents	$	11,353	$	-	$	-	$	-	$	11,353
Total	$	11,353	$	-	$	-	$	-	$	11,353

January 31, 2014
	Cost		Unrealized Gains		Unrealized Losses Less Than 12 Months			Unrealized Losses 12 Months or Longer		Estimated Fair Value
Cash and cash equivalents	$	7,962	$	-	$	-		$	-	$	7,962
Exchange traded marketable securities		4,521		-		(220	)		-		4,301
Total	$	12,483	$	-	$	(220	)	$	-	$	12,263