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Note 4 - Stockholders' Equity (Detail) (USD $) |  |  |  |  |  |  |  | 24 Months Ended |  | 0 Months Ended |  | 1 Months Ended
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May 04, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Nov. 18, 2007 | Oct. 19, 2007 | May 31, 2007 | May 04, 2007 | Dec. 31, 2012 Warrants [Member] | May 04, 2007 Series A Preferred Stock [Member] Initially Be Equal To [Member] | May 04, 2007 Series A Preferred Stock [Member] | Dec. 31, 2012 Series A Preferred Stock [Member] | Nov. 18, 2007 Seven Year Warrants [Member] | Oct. 19, 2007 Seven Year Warrants [Member] | Oct. 31, 2007 Seven Year Warrants [Member] | Oct. 19, 2007 One Year Warrants [Member] | Oct. 31, 2007 One Year Warrants [Member] | Nov. 18, 2007 Five Year Warrants [Member] | Oct. 19, 2007 Five Year Warrants [Member]
Preferred Stock, Shares Authorized |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Par or Stated Value Per Share (in Dollars per share) |  | $ 0.001 | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized |  | 50,000,000 | 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in Dollars per share) |  | $ 0.001 | $ 0.001 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Shares Outstanding |  |  |  |  |  |  |  |  |  | 1,761,900 | 138,400 |  |  |  |  |  |  |
Preferred Stock, Dividends Per Share, Declared (in Dollars per share) |  |  |  |  |  |  |  |  |  | $ 0.119 |  |  |  |  |  |  |  |
Share Price (in Dollars per share) |  |  |  |  |  |  |  |  | $ 1.70 | $ 1.70 |  |  |  |  |  |  |  |
Preferred Stock, Voting Rights |  |  |  |  |  |  |  |  |  | 0.729 |  |  |  |  |  |  |  |
Dividends Payable (in Dollars) |  |  |  |  |  |  |  |  |  |  | $ 174,000 |  |  |  |  |  |  |
Preferred Stock, Liquidation Preference, Value (in Dollars) |  |  |  |  |  |  |  |  |  |  | $ 329,000 |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights |  | 3,704,854 |  | 1,495,952 | 3,141,499 | 1,759,307 | 2,059,307 |  |  |  |  |  | 1,495,952 | 1,495,952 | 1,495,952 | 1,495,952 | 149,595 | 149,595
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) | 5.00 |  |  |  |  |  | 5.00 |  |  |  |  |  |  |  |  |  |  | 3.52
Term of Warrant |  |  |  |  |  |  |  |  |  |  |  | 7 years | 7 years | 7 years | 1 year | 1 year | 5 years | 5 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms |  |  |  |  |  |  |  | 1 year 36 days |  |  |  |  |  |  |  |  |  |

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- Definition The exercise price of each class of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Subparagraph 4 -Article 4 + Details
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- Definition Face amount or stated value of common stock per share; generally not indicative of the fair market value per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition Face amount or stated value per share of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer); generally not indicative of the fair market value per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Description of voting rights of nonredeemable preferred stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 3, 4, 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 + Details
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