|
Note 5 - Customer and Supplier Concentrations (Detail) (USD $)
|
3 Months Ended | |
|---|---|---|
|
Apr. 30, 2013
|
Apr. 30, 2012
|
|
| Fair Value, Concentration of Risk, Total Product Costs | $ 400,000 | $ 654,000 |
| Cost of Revenue | 1,120,000 | 1,869,000 |
|
Cost of Goods, Total [Member]
|
||
| Cost of Revenue | $ 1,000,000 | $ 1,500,000 |