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Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans (USD $) | 9 Months Ended | 12 Months Ended
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Sep. 30, 2013 | Dec. 31, 2012
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items] |  |
Number Outstanding (in Shares) | 2,564,130 | 1,964,130
Weighted Average Remaining Contractual Life (years) | 1 year 324 days | 2 years 54 days
Weighted Average Exercise Price | $ 2.62 | $ 2.70
Number Exercisable (in Shares) | 2,042,753 |
Weighted Average Exercise Price | $ 2.65 |
Price Range 1 [Member] |  |
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items] |  |
Range of Exercise Price, Upper | $ 1.50 |
Number Outstanding (in Shares) | 452,500 |
Weighted Average Remaining Contractual Life (years) | 1 year 146 days |
Weighted Average Exercise Price | $ 1.50 |
Number Exercisable (in Shares) | 452,500 |
Weighted Average Exercise Price | $ 1.50 |
Price Range 2 [Member] |  |
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items] |  |
Range of Exercise Price, Upper | $ 2.35 |
Number Outstanding (in Shares) | 600,000 |
Weighted Average Remaining Contractual Life (years) | 3 years 6 months |
Weighted Average Exercise Price | $ 235 |
Number Exercisable (in Shares) | 150,000 |
Weighted Average Exercise Price | $ 235 |
Price Range 3 [Member] |  |
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items] |  |
Range of Exercise Price, Lower | $ 3.00 |
Range of Exercise Price, Upper | $ 3.60 |
Number Outstanding (in Shares) | 1,511,630 |
Weighted Average Remaining Contractual Life (years) | 1 year 156 days |
Weighted Average Exercise Price | $ 3.06 |
Number Exercisable (in Shares) | 1,440,253 |
Weighted Average Exercise Price | $ 3.04 |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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