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Note 2 - Liquidity (Details Textual) - Subsequent Event [Member] $ in Millions | Mar. 14, 2017 USD ($)
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Purchase Agreement, Maximum Amount of Securities That May Be Sold | $ 1.0
Purchase Agreement, Maximum Amount of Securities That May Be Sold, Increased Amount | 25.0
Private Placement [Member] | Series A Convertible Preferred Stock [Member] |
Proceeds from Issuance of Private Placement | 14.1
Payments of Stock Issuance Costs | $ 1.7

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- Definition The maximum amount of securities that may be sold under the purchase agreement. + References No definition available. + Details
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- Definition The increased maximum amount of securities that may be sold under the purchase agreement. + References No definition available. + Details
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- Definition The cash outflow for cost incurred directly with the issuance of an equity security. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 + Details
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- Details
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