| **Note 7 - Income Taxes (Details) - Deferred Income Taxes (USD $)In Thousands, unless otherwise specified** | Mar. 31, 2014 | Dec. 31, 2013 |
|-------------------------------------------------------------------------------------------------------------|---------------|---------------|
| **Deferred tax assets:**                                                                                    |          |          |
| Net operating loss carryforwards                                                                            | $ 12,210      | $ 12,074      |
| Inventory                                                                                                   | 1,855         | 1,856         |
| Other liabilities                                                                                           | 2,967         | 3,051         |
| Fixed assets                                                                                                | 2,007         | 2,069         |
| Other temporary differences                                                                                 | 716           | 751           |
|                                                                                                             | 19,755        | 19,801        |
| Less: valuation allowance                                                                                   | (19,678)      | (19,745)      |
| Total deferred tax assets                                                                                   | 77            | 56            |
| **Deferred tax liability:**                                                                                 |          |          |
| Intangibles                                                                                                 | (1,385)       | (1,453)       |
| Other temporary differences                                                                                 | 163           | (13)          |
| Net deferred tax liability                                                                                  | (1,145)       | (1,410)       |
| **As reported:**                                                                                            |          |          |
| Non-current deferred tax assets                                                                             | 77            | 56            |
| Current deferred tax liability                                                                              | (260)         | (271)         |
| Non-current deferred tax liability                                                                          | $ (962)       | $ (1,195)     |

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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, net of deferred tax liability attributable to taxable temporary differences expected to be realized or consumed after one year (or the normal operating cycle, if longer).
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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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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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.
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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed within one year or operating cycle, if longer.
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| - Definition
Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.
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Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).
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