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Note 11 - Segments and Geographic Information (Details) - Additional Business Unit Gross Profitability Detail for Products Segment (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Products segment net sales: |  |  |  |
Products segment net sales | $ 7,890 | $ 4,827 | $ 19,508 | $ 14,938
Products segment gross profit: |  |  |  |
Products segment gross profit | 2,558 | 930 | 6,154 | 3,051
Pool and Commercial Products [Member] |  |  |  |
Products segment net sales: |  |  |  |
Products segment net sales | 1,648 | 1,451 | 4,743 | 4,739
Products segment cost of sales: |  |  |  |
Products segment cost of sales | 1,062 | 991 | 3,027 | 3,312
Products segment gross profit: |  |  |  |
Products segment gross profit | 586 | 460 | 1,716 | 1,427
Government Products [Member] |  |  |  |
Products segment net sales: |  |  |  |
Products segment net sales | 6,002 | 707 | 11,164 | 2,563
Products segment cost of sales: |  |  |  |
Products segment cost of sales | 3,945 | 445 | 7,470 | 1,746
Products segment gross profit: |  |  |  |
Products segment gross profit | 2,057 | 262 | 3,694 | 817
Research and Development Services [Member] | Products Segment [Member] |  |  |  |
Products segment net sales: |  |  |  |
Products segment net sales | 7,666 | 2,723 | 15,963 | 9,044
Products segment cost of sales: |  |  |  |
Products segment cost of sales | 5,023 | 2,009 | 10,532 | 6,701
Products segment gross profit: |  |  |  |
Products segment gross profit | 2,643 | 714 | 5,431 | 2,343
Research and Development Services [Member] |  |  |  |
Products segment net sales: |  |  |  |
Products segment net sales | 16 | 565 | 56 | 1,742
Products segment cost of sales: |  |  |  |
Products segment cost of sales | 16 | 573 | 35 | 1,643
Products segment gross profit: |  |  |  |
Products segment gross profit |  | (8) | 21 | 99
Products Segment [Member] |  |  |  |
Products segment net sales: |  |  |  |
Products segment net sales | 7,666 | 2,723 | 15,963 | 9,044
Products segment gross profit: |  |  |  |
Products segment gross profit | $ 2,643 | $ 714 | $ 5,431 | $ 2,343

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- Definition Total costs related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 2 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales 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) -URI http://asc.fasb.org/extlink&oid=26872669&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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