Note 11 - Employee Benefit Plan (Detail) (USD $)	12 Months Ended
Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Defined Contribution Plan, Employer Matching Contribution, Percent	25.00%
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent	1.50%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 50,000	$ 39,000	$ 35,000

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration