v3.23.1

Note 15 - Common Stock Reserved for Issuance (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of Common Stock Reserved for Issuance [Table Text Block] |
|  | December 31, 2022 |  |  | December 31, 2021 |
Outstanding common stock warrants |  |  | 15,928,867 |  |  |  | 15,928,867 |
Outstanding stock options and RSUs |  |  | 13,130,144 |  |  |  | 5,977,179 |
Preferred shares |  |  | 31,850,000 |  |  |  | 3,790,755 |
Shares reserved for conversion of future non-voting preferred share issuance |  |  | 1,209,245 |  |  |  | 1,209,245 |
Shares reserved for conversion of future voting preferred share issuance |  |  | 9,150,000 |  |  |  | — |
Shares reserved for future option grants and RSUs |  |  | 376,201 |  |  |  | 589,064 |
Shares reserved for Lincoln Park |  |  | 15,814,471 |  |  |  | 5,222,867 |
Shares reserved for Madryn Noteholders |  |  | 8,215,706 |  |  |  | 8,213,880 |
Total common stock reserved for issuance |  |  | 95,674,634 |  |  |  | 40,931,857 |

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