Note 10 - Stock-based Compensation - SARs Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended
	Oct. 31, 2016 USD ($) $ / shares shares
Stock Appreciation Rights (SARs) [Member]
Outstanding (in shares) | shares	2,596
Outstanding (in dollars per share) | $ / shares	$ 14.74
Granted (in shares) | shares	380
Granted (in dollars per share) | $ / shares	$ 18.64
Exercised (in shares) | shares	(97)
Exercised (in dollars per share) | $ / shares	$ 10.94
Expired (in shares) | shares	(17)
Expired (in dollars per share) | $ / shares	$ 12.56
Forfeited (in shares) | shares	(6)
Forfeited (in dollars per share) | $ / shares	$ 12.16
Outstanding (in shares) | shares	2,856
Outstanding (in dollars per share) | $ / shares	$ 15.41
Outstanding	4 years 219 days
Outstanding | $	$ 24,198
Vested and exercisable (in shares) | shares	1,863
Vested and exercisable (in dollars per share) | $ / shares	$ 12.86
Vested and exercisable	3 years 219 days
Vested and exercisable | $	$ 20,304