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Note 10 - Segment Information (Detail) - Net Sales by Market (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011
Net sales to external customers: |  |
Net Sales | $ 37,514 | $ 31,162
North America [Member] |  |
Net sales to external customers: |  |
Net Sales | 1,816 | 1,487
Hong Kong [Member] |  |
Net sales to external customers: |  |
Net Sales | 26,235 | 21,038
China [Member] |  |
Net sales to external customers: |  |
Net Sales | 1,081 | 1,131
Taiwan [Member] |  |
Net sales to external customers: |  |
Net Sales | 2,074 | 1,931
South Korea [Member] |  |
Net sales to external customers: |  |
Net Sales | 285 | 445
Japan [Member] |  |
Net sales to external customers: |  |
Net Sales | 168 | 240
Russia [Member] |  |
Net sales to external customers: |  |
Net Sales | 5,540 | 4,537
Europe [Member] |  |
Net sales to external customers: |  |
Net Sales | $ 315 | $ 353

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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