Note 1 - Nature of Operations and Basis of Presentation - Summary of Non-vested Restricted Stock Unit Transactions for Common Stock (Details) (Restricted Stock Units (RSUs) [Member], USD $)	3 Months Ended		9 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013
Restricted Stock Units (RSUs) [Member]
Outstanding non-vested restricted stock units as of February 28: (in shares)			295,040	57,030
Granted (in shares)				280,900
Vested (in shares)	0	0	(56,199)	(41,390)
Cancelled/forfeited (in shares)				(1,500)
Outstanding non-vested restricted stock units as of November 30: (in shares)	238,841	295,040	238,841	295,040
Weighted average grant date fair value (in dollars per share)	$ 12.14	$ 12.09	$ 12.14	$ 12.09
Weighted average remaining vesting period (in years)			4 years 120 days	5 years 87 days