Note 10 - RSUs Activity (Details) - Restricted Stock Units (RSUs) [Member] shares in Thousands	6 Months Ended
	Jul. 31, 2016 $ / shares shares
Restricted stock (in shares) | shares	617
Restricted stock (in dollars per share) | $ / shares	$ 20.91
Granted (in shares) | shares	299
Granted (in dollars per share) | $ / shares	$ 18.45
Released (1) (in shares) | shares	(250)	[1]
Released (1) (in dollars per share) | $ / shares	$ 18.98	[1]
Forfeited (in shares) | shares	(18)
Forfeited (in dollars per share) | $ / shares	$ 21.09
Restricted stock (in shares) | shares	648
Restricted stock (in dollars per share) | $ / shares	$ 20.51

[1] The number of RSUs released includes shares withheld on behalf of employees to satisfy statutory tax withholding requirements.