Note 9 - Employee Benefit Plans (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Jan. 31, 2016 |
Jan. 31, 2015 |
|
| Minimum [Member] | ||
| Defined Contribution Plan Employee Contribution | 1.00% | |
| Maximum [Member] | ||
| Defined Contribution Plan Employee Contribution | 20.00% | |
| Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0 |
| Number of Days | 30 days | |
| Years of Age | 18 years | |
| Defined Contribution Plans Vesting Period | 4 years | |
| Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 100.00% | |