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Note 2 - Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block] |
|  | June 30, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Cash and cash equivalents |  | $ | 3,931 |  |  | $ | 7,504 |
Restricted cash included in other assets |  |  | 155 |  |  |  | 475 |
Total cash, cash equivalents, and restricted cash in the condensed consolidated balance sheets |  | $ | 4,086 |  |  | $ | 7,979 |
Schedules of Concentration of Risk, by Product [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Avenova |  | $ | 1,626 |  |  | $ | 1,883 |  |  | $ | 3,052 |  |  | $ | 3,458 |
DERMAdoctor |  |  | 592 |  |  |  | — |  |  |  | 1,483 |  |  |  | — |
NeutroPhase |  |  | 509 |  |  |  | 175 |  |  |  | 657 |  |  |  | 175 |
Other products |  |  | 316 |  |  |  | 68 |  |  |  | 474 |  |  |  | 294 |
Total product revenue, net |  | 3,043 |  |  |  | 2,126 |  |  |  | 5,666 |  |  |  | 3,927 |
Other revenue, net |  |  | 2 |  |  |  | 7 |  |  |  | 8 |  |  |  | 13 |
Total sales, net |  | $ | 3,045 |  |  | $ | 2,133 |  |  | $ | 5,674 |  |  | $ | 3,940 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | June 30, |  |  | December 31, |
Major distribution partner |  | 2022 |  |  | 2021 |
Avenova Spray Pharmacy Distributor A |  |  | 38 | % |  |  | 11 | %
Avenova Spray Pharmacy Distributor B |  |  | 13 | % |  |  | 13 | %
Amazon |  |  | 12 | % |  |  | * | %
Major U.S. Retailer A |  |  | 10 | % |  |  | * | %
Major U.S. Retailer B |  |  | * | % |  |  | 33 | %
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
Numerator |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Net loss |  | $ | (2,155 | ) |  | $ | (1,859 | ) |  | $ | (2,266 | ) |  | $ | (3,377 | )
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares of common stock outstanding, basic and diluted |  |  | 52,735 |  |  |  | 42,561 |  |  |  | 51,419 |  |  |  | 42,174 |
Net loss per share, basic and diluted |  | $ | (0.04 | ) |  | $ | (0.04 | ) |  | $ | (0.04 | ) |  | $ | (0.08 | )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
|  | As of June 30, |
|  | 2022 |  |  | 2021 |
Series B Preferred |  |  | 29,050 |  |  |  | — |
Stock options |  |  | 4,446 |  |  |  | 3,873 |
Stock warrants |  |  | 44,582 |  |  |  | 7,082 |
|  |  | 78,078 |  |  |  | 10,955 |

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