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Note 2 - Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2024
Notes Tables |
Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2024 |  |  | 2023 |
Cash and cash equivalents |  | $ | 1,823 |  |  | $ | 3,130 |
Cash and cash equivalents, discontinued operations |  |  | — |  |  |  | (206 | )
Restricted cash included in other assets |  |  | 476 |  |  |  | 476 |
Total cash, cash equivalents, and restricted cash in the condensed consolidated statements of cash flows |  | $ | 2,299 |  |  | $ | 3,400 |
Disaggregation of Revenue [Table Text Block] |
|  | Three Months Ended March 31, |
|  | 2024 |  |  | 2023 |
Avenova Spray |  | $ | 2,096 |  |  | $ | 1,937 |
Other products |  |  | 528 |  |  |  | 395 |
Total product revenue, net |  |  | 2,624 |  |  |  | 2,332 |
Other revenue, net |  |  | 7 |  |  |  | 7 |
Total sales, net |  | $ | 2,631 |  |  | $ | 2,339 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | March 31, |  |  | December 31, |
Major distribution partner |  | 2024 |  |  | 2023 |
Major U.S. Retailer A |  |  | 38 | % |  |  | 22 | %
Avenova Spray Pharmacy Distributor A |  |  | 18 | % |  |  | 14 | %
Phase One Health |  |  | 16 | % |  |  | * | %
Chongqing Pioneer Pharma Holdings Limited |  |  | * | % |  |  | 36 | %
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | Balance at March 31, |
|  | 2024 |  |  | 2023 |
Common stock equivalent of Series B Non-Voting Convertible Preferred Stock (the “Series B Preferred Stock”) |  |  | 3,616,000 |  |  |  | 1,847,580 |
Common stock equivalent of Series C Non-Voting Convertible Preferred Stock (the “Series C Preferred Stock”) |  |  | 5,192,961 |  |  |  | 357,750 |
Stock options |  |  | 116,700 |  |  |  | 121,203 |
Stock warrants |  |  | 8,382,447 |  |  |  | 2,305,519 |
|  |  | 17,308,108 |  |  |  | 4,632,052 |

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