Note 3 - Restricted Cash (Details Textual) |
Mar. 31, 2026
USD ($)
|
Feb. 23, 2026
USD ($)
Advance
|
Dec. 31, 2025
USD ($)
|
Sep. 22, 2025
USD ($)
Advance
|
Jun. 18, 2025
USD ($)
Advance
|
Aug. 27, 2024
USD ($)
|
|---|---|---|---|---|---|---|
| Restricted Cash and Cash Equivalents Items [Line Items] | ||||||
| Restricted cash | $ 3,085,000 | $ 3,161,000 | ||||
| Hanmi Loan Agreement [Member] | ||||||
| Restricted Cash and Cash Equivalents Items [Line Items] | ||||||
| Loan agreement amount | $ 10,000,000 | |||||
| Hanmi Facility Agreement [Member] | ||||||
| Restricted Cash and Cash Equivalents Items [Line Items] | ||||||
| Restricted cash | $ 3,100,000 | $ 0 | ||||
| Loan agreement amount | $ 11,100,000 | $ 11,900,000 | $ 8,500,000 | |||
| Maximum number of advances | Advance | 6 | 8 | 5 | |||
| Maximum amount available under single advance | $ 2,000,000 | $ 2,000,000 | $ 2,500,000 | |||
| Minimum amount available under single advance | $ 500,000 | $ 500,000 |