| **Note 7 - Income Taxes (Details) - Deferred Income Taxes (USD $)In Thousands, unless otherwise specified** | Sep. 30, 2013 | Dec. 31, 2012 |
|-------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Deferred tax assets:**                                                                                    |          |          |
| Net operating loss carryforwards                                                                            | $ 13,431      | $ 14,491      |
| Inventory                                                                                                   | 1,795         | 1,769         |
| Other liabilities                                                                                           | 3,569         | 3,055         |
| Fixed assets and other capitalized assets                                                                   | 2,061         | 440           |
| Other temporary differences                                                                                 | 682           | 589           |
|                                                                                                             | 21,538        | 20,344        |
| Deferred tax valuation allowance                                                                            | (21,229)      | (20,344)      |
|                                                                                                             | $ 309         |          |

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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.
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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.
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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment.
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.
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