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Note 14 - Foreign Revenues and Operations (Detail) - Foreign Revenues (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Revenues | $ 16,530 |  | $ 16,324 |
United Kingdom [Member] |  |  |  |
Revenues | 1,154 |  | 1,352 |
Pacific Rim [Member] |  |  |  |
Revenues | 562 | [1] | 483 | [1]
Canada [Member] |  |  |  |
Revenues | 518 |  | 418 |
Brazil [Member] |  |  |  |
Revenues | 25 |  | 79 |
Other [Member] |  |  |  |
Revenues | 54 |  | 43 |
Foreign [Member] |  |  |  |
Revenues | 2,313 |  | 2,375 |
United States [Member] |  |  |  |
Revenues | $ 14,217 |  | $ 13,949 |
[1] | Includes Australia, New Zealand, Japan and Singapore

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- Definition Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains. + 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) -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
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration