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Note 8 - Leases (Details Textual) $ in Thousands | 1 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2026 USD ($) | Mar. 31, 2026 USD ($) | Oct. 31, 2021 USD ($) | Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Dec. 31, 2025 USD ($) | Dec. 31, 2021 | Feb. 28, 2019 | Oct. 31, 2014 USD ($) ft²
Restricted Cash |  |  |  | $ 1,364 |  | $ 1,316 |  |  |  |
Reduction of Lease Liability and Right-of-use Asset Due to Lease Modification |  |  |  | 1,126 |  | $ 0 |  |  |  |
Operating Lease, Liability |  |  |  | 9,054 | [1] |  | $ 8,065 |  |  |
Operating Lease, Right-of-Use Asset |  |  |  | $ 7,085 |  |  | $ 6,278 |  |  |
Lessee, Operating Lease, Renewal Term (Year) |  |  |  | 5 years |  |  |  |  |  |
Operating Lease, Weighted Average Remaining Lease Term (Year) |  |  |  | 5 years 4 months 24 days |  |  |  |  |  |
Operating Lease, Weighted Average Discount Rate, Percent |  |  |  | 8.44% |  |  |  |  |  |
Operating Lease, Payments, Use |  |  |  | $ 800 |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) |  |  |  | 6 years |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |
Lessee, Operating Lease, Remaining Lease Term (Year) |  |  |  | 1 year |  |  |  |  |  |
Office Space in New York City Leased by FBIO [Member] |  |  |  |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  |  |  |  |  | 24,000
Restricted Cash |  |  |  |  |  |  |  |  |  | $ 1,300
Reduction of Lease Liability and Right-of-use Asset Due to Lease Modification |  |  |  | $ 1,100 |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  |  |  |  |  |  |  |  | 10.25% |
Gansevoort Lease [Member] |  |  |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Year) |  | 5 years |  |  |  |  |  |  |  |
Average Annual Rental Payments |  | $ 400 |  |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  |  |  | 8.40% |  |  |  |  |  |
The North Carolina Lease [Member] |  |  |  |  |  |  |  |  |  |
Reduction of Lease Liability and Right-of-use Asset Due to Lease Modification | $ 900 |  |  |  |  |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Year) |  |  | 5 years |  |  |  |  |  |  |
Average Annual Rental Payments |  |  | $ 200 |  |  |  |  |  |  |
Lessee, Operating Lease, Discount Rate |  |  |  |  |  |  |  | 5.65% |  |
The North Carolina Lease [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Operating Lease, Expense |  |  |  | $ 100 |  |  |  |  |  |
[1] | As the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date and considering the term of the lease to determine the present value of lease payments. The Company used the incremental borrowing rate of 10.25% on February 28, 2019, for operating leases that commenced prior to that date through December 31, 2021. The Company used an incremental borrowing rate of 5.65% for the NC lease. The Company used an incremental borrowing rate of 8.4% for the modified Office Agreement operating lease.

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