Note 5 - Share-based Compensation (Details Textual) - USD ($)
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3 Months Ended |
12 Months Ended |
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Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jan. 31, 2025 |
Jan. 01, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Aug. 13, 2024 |
Jun. 30, 2024 |
Jun. 13, 2024 |
Mar. 31, 2024 |
Jun. 22, 2018 |
Sep. 07, 2017 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
| Stock Issued During Period, Shares, Issued for Services (in shares) |
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2,807,771
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1,107,594
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| Stock Issued During Period, Value, Issued for Services |
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$ 557,000
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$ 284,000
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| Share Price (in dollars per share) |
$ 0.18
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$ 0.18
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$ 0.18
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| 2024 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
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10 years
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Per Year (in shares) |
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2
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) |
42,000,000
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42,000,000
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |
25,206,986
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25,206,986
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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11,299,094
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5,493,920
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| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
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$ 0.2
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$ 0.23
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| 2018 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
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10 years
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares) |
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9,343,614
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9,343,614
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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1,547,938
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |
$ 334,000
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$ 334,000
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |
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3 years
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |
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566,951
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485,000
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| Stock Issued During Period, Shares, Cashless Exercise of Options (in shares) |
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265,800
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| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
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$ 0.3
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| Equity Incentive Plan 2007 [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
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10 years
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| Non Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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444,921
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85,251
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period (in shares) |
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463,882
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| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
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$ 0.19
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$ 0.23
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| Share-Based Payment Arrangement, Option [Member] | 2024 Equity Incentive Plan [Member] |
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |
760,000
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$ 760,000
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |
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4 years
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| Share-Based Payment Arrangement, Option [Member] | Non Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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444,921
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85,251
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
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$ 72,000
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$ 18,000
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount |
$ 39,000
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$ 39,000
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| Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) |
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2 years
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| Share-Based Payment Arrangement, Option [Member] | Non Plan [Member] | Minimum [Member] |
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| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
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$ 0.18
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$ 0.23
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| Share-Based Payment Arrangement, Option [Member] | Non Plan [Member] | Maximum [Member] |
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| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
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$ 0.28
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$ 0.26
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| Share-Based Payment Arrangement, Option [Member] | Clyra Medical Technologies [Member] |
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| Share-Based Payment Arrangement, Expense |
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$ 1,203,000
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$ 528,000
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| Selling, General and Administrative Expenses [Member] | Share-Based Payment Arrangement, Option [Member] |
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| Share-Based Payment Arrangement, Expense |
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$ 2,965,000
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$ 2,063,000
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| Officer [Member] |
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| Stock Issued During Period, Shares, Issued for Services (in shares) |
808,908
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177,235
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11,250
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16,579
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41,087
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350,751
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0
|
0
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1,348,144
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57,666
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| Stock Issued During Period, Value, Issued for Services |
$ 134,000
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$ 30,000
|
$ 70,000
|
$ 3,000
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$ 4,000
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$ 9,000
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$ 237,000
|
$ 13,000
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| Shares Issued, Price Per Share (in dollars per share) |
$ 0.18
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$ 0.17
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$ 0.21
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$ 0.28
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$ 0.19
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$ 0.23
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$ 0.21
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$ 0.28
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|
$ 0.18
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$ 0.19
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| Consultants and Vendors [Member] |
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| Stock Issued During Period, Shares, Issued for Services (in shares) |
539,236
|
147,059
|
564,252
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|
94,126
|
219,816
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|
446,989
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|
288,997
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|
209,080
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|
1,459,627
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1,049,928
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| Stock Issued During Period, Value, Issued for Services |
$ 94,000
|
$ 25,000
|
$ 143,000
|
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|
$ 18,000
|
$ 54,000
|
|
$ 116,000
|
|
$ 83,000
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$ 58,000
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|
$ 320,000
|
$ 271,000
|
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| Shares Issued, Price Per Share (in dollars per share) |
$ 0.17
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$ 0.18
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$ 0.25
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$ 0.27
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$ 0.19
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$ 0.23
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|
$ 0.26
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|
$ 0.35
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|
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$ 0.25
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$ 0.27
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$ 0.26
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$ 0.35
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$ 0.17
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$ 0.19
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| Board of Directors, Employees, and Consultants [Member] | 2024 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
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|
11,299,094
|
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
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$ 1,925,000
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| Board of Directors, Employees, and Consultants [Member] | 2024 Equity Incentive Plan [Member] | Minimum [Member] |
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| Share Price (in dollars per share) |
0.17
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$ 0.17
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| Board of Directors, Employees, and Consultants [Member] | 2024 Equity Incentive Plan [Member] | Maximum [Member] |
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| Share Price (in dollars per share) |
$ 0.28
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|
$ 0.28
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| Board of Directors, Employees, and Consultants [Member] | 2018 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
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|
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|
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|
1,547,938
|
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
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|
|
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|
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|
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|
$ 418,000
|
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| Board of Directors, Employees, and Consultants [Member] | Replacement Options [Member] | 2018 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
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|
|
|
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|
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|
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|
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|
544,841
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
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|
|
|
|
|
|
|
|
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|
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|
$ 160,000
|
|
| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
|
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|
$ 0.35
|
|
| Director [Member] | 2024 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
1,750,369
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
$ 311,000
|
|
|
| Director [Member] | 2018 Equity Incentive Plan [Member] |
|
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|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
267,746
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 85,000
|
|
| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.35
|
|
| Employees [Member] | Employee Retention Program [Member] | 2024 Equity Incentive Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
4,182,205
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 730,000
|
|
|
| Employees [Member] | Employee Retention Program [Member] | 2018 Equity Incentive Plan [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
735,351
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 173,000
|
|
| Employees [Member] | Employee Retention Program [Member] | 2018 Equity Incentive Plan [Member] | Minimum [Member] |
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
|
|
|
|
| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.17
|
|
| Employees [Member] | Employee Retention Program [Member] | 2018 Equity Incentive Plan [Member] | Maximum [Member] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.35
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| Consultants [Member] | 2024 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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5,066,520
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
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$ 817,000
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| Chief Financial Officer [Member] | 2024 Equity Incentive Plan [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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300,000
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value |
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$ 67,000
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| Chief Financial Officer [Member] | Share-Based Payment Arrangement, Option [Member] |
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year) |
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10 years
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10 years
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) |
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300,000
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300,000
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| Engagement Extension, Term (Year) |
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1 year
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1 year
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross, Per Month (in shares) |
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25,000
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25,000
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in dollars per share) |
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$ 0.2536
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$ 0.24
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| Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Available Grants in Period, Gross, Upon Renewal (in shares) |
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300,000
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| Share-based Compensation Arrangement by Share-based Payment Award, Options, Vesting Period for Renewable Options (Year) |
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1 year
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