Note 11 - Employee Benefit Plan (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Feb. 28, 2017 |
Feb. 29, 2016 |
Feb. 28, 2015 |
|
| Defined Contribution Plan Employers Matching Contribution Vesting Period | 3 years | ||
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 25.00% | ||
| Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 1.50% | ||
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 66,000 | $ 62,000 | $ 60,000 |