Note 2 - Significant Accounting Policies and Basis of Presentation (Details Textual) - USD ($) $ / shares in Units, shares in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Jul. 31, 2019 |
Jan. 01, 2019 |
|
| Cost Reimbursements from SBIR Grant as Offset to Research and Development Expenses | $ 382,000 | $ 318,000 | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 7.3 | 0.5 | |||
| Asset Impairment Charges, Total | $ 0 | $ 0 | $ 0 | ||
| Operating Lease, Right-of-Use Asset | 204,300 | 204,300 | |||
| Operating Lease, Liability, Total | $ 183,520 | $ 183,520 | |||
| Accounting Standards Update 2016-02 [Member] | |||||
| Operating Lease, Right-of-Use Asset | $ 53,000 | ||||
| Operating Lease, Liability, Total | $ 75,700 | ||||
| Underwritten Public Offering [Member] | Prefunded Warrants [Member] | |||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.0001 | ||||
| X | ||||||||||
- Definition The amount of cost reimbursements from SBIR grant as an offset to research and development expenses. No definition available.
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| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
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