Note 5 - Accrued Liabilities (Details) - USD ($) $ in Thousands |
Jan. 31, 2016 |
Jan. 31, 2015 |
|---|---|---|
| Uninvoiced Materials and Services Received [Member] | ||
| Accrued liabilities | $ 331 | $ 331 |
| Accrued Legal and Professional Fees [Member] | ||
| Accrued liabilities | 169 | 138 |
| Accrued Payroll and Related Expenses [Member] | ||
| Accrued liabilities | 33 | 38 |
| Accrued Warranty [Member] | ||
| Accrued liabilities | 4 | 4 |
| Accrued Other Liabilities [Member] | ||
| Accrued liabilities | 150 | 337 |
| Accrued liabilities | $ 687 | $ 848 |