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Note 4 - Property and Equipment (Detail) - Property and Equipment (Parentheticals) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Equipment [Member] | Minimum [Member] |  |
Property and Equipment, Useful Life | 3 years | 3 years
Equipment [Member] | Maximum [Member] |  |
Property and Equipment, Useful Life | 15 years | 15 years
Tooling [Member] | Minimum [Member] |  |
Property and Equipment, Useful Life | 2 years | 2 years
Tooling [Member] | Maximum [Member] |  |
Property and Equipment, Useful Life | 5 years | 5 years
Furniture and Fixtures [Member] |  |
Property and Equipment, Useful Life | 5 years | 5 years
Software [Member] |  |
Property and Equipment, Useful Life | 3 years | 3 years
Minimum [Member] |  |
Property and Equipment, Useful Life | 2 years |
Maximum [Member] |  |
Property and Equipment, Useful Life | 15 years |

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration