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Note 16 - Supplemental information: (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
One Customer [Member] | Customer Concentration Risk [Member] |  |  |
Number Of Customers | 1 |  |
Three Customers [Member] | Customer Concentration Risk [Member] |  |  |
Number Of Customers |  | 3 |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Number Of Customers | 1 |  |
Customer Concentration Risk [Member] |  |  |
Number Of Customers | 0 | 0 | 0
One Customer [Member] | Accounts Receivable [Member] |  |  |
Concentration Risk, Percentage | 16.00% |  |
Sales Revenue, Goods, Net [Member] |  |  |
Concentration Risk, Percentage | 10.00% |  |
Accounts Receivable [Member] |  |  |
Number Of Customers | 0 |  | 3
Concentration Risk, Percentage | 10.00% | 16.00% | 35.00%

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- Definition Represents the number of customers as defined by the entity. + References No definition available. + Details
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Period Type: | duration

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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