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Note 7 - Preferred Stock Issuance and Conversion (Details Textual) - Series B Preferred Stock [Member] - USD ($) | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008 | Dec. 31, 2007 | Dec. 31, 2006 | Dec. 31, 2005 | Dec. 31, 2004 | Dec. 31, 2003
Other Noncurrent Liabilities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock of Subsidiary Accrued Dividends | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000 | $ 64,000
Preferred Stock, Liquidation Preference Per Share | $ 1 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock of Subsidiary Redeemable Price per Share | $ 1 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Dividend Rate, Percentage | 5.00% |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock of Subsidiary per Share Amount on Which Dividend Rate Applied | $ 1 |  |  |  |  |  |  |  |  |  |  |  |
Dividends Payable | $ 867,000 |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph a -Article 7 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21484-112644 Reference 3: 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.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29 -Article 5 + Details
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