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Note 4 - Long-term Debt (Details Textual) | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) $ / shares shares | Aug. 31, 2020 USD ($) $ / shares shares | Nov. 30, 2019 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2024 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares | Nov. 13, 2019 USD ($)
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  | 359,116 |  | 359,116 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  | $ 5.46 |  | $ 5.46 |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  | $ 0.001 |  | $ 0.001 |  | $ 0.001 |
Share Price (in dollars per share) | $ / shares | $ 6 |  |  |  | $ 6 |  | $ 6 |  |
Interest Expense, Operating and Nonoperating |  |  |  | $ 1,212,000 | $ 211,000 |  |  |  |
Amortization of Debt Discount (Premium) |  |  |  | 189,000 | 29,000 | $ 521,000 | $ 70,000 |  |
Accrued Liabilities, Current |  |  |  | 9,117,000 |  | 9,117,000 |  | $ 8,914,000 |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |
Liability, Interest and Exit Fees [Member] |  |  |  |  |  |  |  |  |
Accrued Liabilities, Current |  |  |  | 454,000 |  | 454,000 |  | $ 182,000 |
Ipsen Biopharmaceuticals, Inc [Member] |  |  |  |  |  |  |  |  |
Interest Expense, Operating and Nonoperating |  |  |  |  |  | 350,000 |  |  |
Debt Instrument, Accrued Exit Fees | $ 70,000 |  |  | 70,000 | $ 70,000 | 70,000 | $ 70,000 |  |
Accounts Receivable, after Allowance for Credit Loss |  |  |  | 5,000,000 |  | 5,000,000 |  |  |
SWK Warrants [Member] |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  | 18,141 | 51,239 |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  | $ 6.62 | $ 5.86 |  |  |  |  |  |
Warrants and Rights Outstanding |  |  | $ 51,239 |  |  |  |  |  |
Fair Value Adjustment of Warrants |  | $ 94,000 | $ 226,000 |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  | $ 6.85 | $ 5.75 |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  | 7 years | 7 years |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.95 | 0.95 |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0 | 0 |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  | 0.004 | 0.018 |  |  |  |  |  |
Common Stock Warrants [Member] |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares | 289,736 |  |  |  | 289,736 |  | 289,736 |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares | $ 5.32 |  |  |  | $ 5.32 |  | $ 5.32 |  |
Warrants and Rights Outstanding | $ 1,170,000 |  |  |  | $ 1,170,000 |  | $ 1,170,000 |  |
Common Stock Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | 63.8 |  |  |  | 63.8 |  | 63.8 |  |
Common Stock Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | 0 |  |  |  | 0 |  | 0 |  |
Common Stock Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | 3.67 |  |  |  | 3.67 |  | 3.67 |  |
Common Stock Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input | 7 |  |  |  | 7 |  | 7 |  |
SWK Credit Agreement [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  | 389,000 |  | 389,000 |  |  |
Debt Instrument, Accrued Exit Fees |  |  |  | 756,000 |  | 756,000 |  |  |
SWK Credit Agreement [Member] | SWK Holdings Corporation [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  |  | $ 10,000,000
The Amended Agreement [Member] | SWK Holdings Corporation [Member] |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 30,000 |  |  |  | $ 30,000 |  | $ 30,000 |  |
Debt Instrument, Basis Spread on Variable Rate | 6.75% |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal | $ 3,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid | $ 9,000,000 |  |  |  | $ 9,000,000 |  | $ 9,000,000 |  |
Debt Instrument, Exit Fee as a Percentage of Outstanding Amounts | 5.00% |  |  |  | 5.00% |  | 5.00% |  |
Debt Instrument, Unamortized Discount | $ 555,000 |  |  | $ 555,000 | $ 555,000 | $ 555,000 | $ 555,000 |  |

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