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Note 6 - Debt (Details Textual) |  |  |  |  |  | 1 Months Ended | 12 Months Ended | 33 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 02, 2024 USD ($) | Apr. 05, 2022 | Aug. 11, 2020 USD ($) | Nov. 30, 2019 USD ($) $ / shares shares | Nov. 13, 2019 USD ($) | Sep. 30, 2024 USD ($) $ / shares shares | Aug. 31, 2020 USD ($) $ / shares shares | Nov. 30, 2019 USD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) $ / shares | Dec. 31, 2022 USD ($) $ / shares shares | Nov. 13, 2024 | Nov. 13, 2020 USD ($) | Mar. 31, 2020 USD ($)
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  |  |  |  |  |  | 359,116 |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 5.46 |  |  |  |  |
Warrants and Rights Outstanding |  |  |  |  |  | $ 1,170,000 |  |  |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | 0.001 | $ 0.001 |  |  |  |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price (in dollars per share) | $ / shares |  |  |  |  |  | $ 6 |  |  | $ 3.22 | $ 2.32 | $ 2.32 |  |  |
Interest Expense, Debt |  |  |  |  |  |  |  |  | $ 2,005,000 | $ 1,060,000 | $ 955,000 |  |  |
Amortization of Debt Discount (Premium) |  |  |  |  |  |  |  |  | 1,109,000 | 117,000 | $ 127,000 |  |  |
Accrued Liabilities, Current |  |  |  |  |  |  |  |  | 8,914,000 | 5,386,000 |  |  |  |
Liability, Interest and Exit Fees [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued Liabilities, Current |  |  |  |  |  |  |  |  | 182,000 | $ 332,000 |  |  |  |
SWK Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares |  |  |  | 51,239 |  |  | 18,141 | 51,239 |  |  |  |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  | $ 5.86 |  |  | $ 6.62 | $ 5.86 |  |  |  |  |  |
Warrants and Rights Outstanding |  |  |  | $ 51,239 |  |  |  | $ 51,239 |  |  |  |  |  |
Fair Value Adjustment of Warrants |  |  |  |  |  |  | $ 94,000 | $ 226,000 |  |  |  |  |  |
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |  |  |  | $ 5.75 |  |  | $ 6.85 | $ 5.75 |  |  |  |  |  |
Warrants and Rights Outstanding, Term (Year) |  |  |  | 7 years |  |  | 7 years | 7 years |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  | 0.95 |  |  | 0.95 | 0.95 |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  | 0 |  |  | 0 | 0 |  |  |  |  |  |
SWK Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  | 0.018 |  |  | 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 |  |  |  |  | 632,231 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |  |  |  |  |  | $ 5.32 |  |  |  |  |  |  |  |
Warrants and Rights Outstanding |  |  |  |  |  | $ 1,170,000 |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  |  |  | 1,170,000 |  |  |  |  |
Common Stock Warrants [Member] | Measurement Input, Price Volatility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 63.8 |  |  |  |  |  |  |  |
Common Stock Warrants [Member] | Measurement Input, Expected Dividend Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Common Stock Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 3.67 |  |  |  |  |  |  |  |
Common Stock Warrants [Member] | Measurement Input, Expected Term [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants and Rights Outstanding, Measurement Input |  |  |  |  |  | 7 |  |  |  |  |  |  |  |
SWK Credit Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Unamortized Discount |  |  |  |  |  |  |  |  | $ 559,000 |  |  |  |  |
SWK Credit Agreement [Member] | SWK Holdings Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  | $ 5,000,000 | 5,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant Agreement, Additional Amount |  |  |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant Requirements, Minimum Cash Balance |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 30,000,000 |  |  |  |  |  |  |  |
SWK Credit Agreement [Member] | SWK Holdings Corporation [Member] | Scenario, Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed |  |  |  |  |  |  |  |  |  |  |  | 5.50% |  |
The Amended Agreement [Member] | SWK Holdings Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  | $ 2,000,000 |  |  |  | $ 2,000,000 |  |  |  |  |  |  |
Debt Instrument, Covenant Agreement, Additional Amount |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000
Long-Term Debt, Gross |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000
Debt Instrument, Basis Spread on Variable Rate | 6.75% | 8.00% |  |  |  | 6.75% |  |  | 8.26% |  |  |  |  |
Debt Instrument, LIBOR Floor Rate |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument SOFR Floor Rate |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |
Line Of Credit Facility, Additional Borrowing Capacity | $ 25,700,000 |  |  |  |  | $ 25,700,000 |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 30,000,000 |  |  |  |  | $ 30,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Term (Year) | 3 years |  |  |  |  | 3 years |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment, Principal |  |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid |  |  |  |  |  | $ 9,000,000 |  |  |  |  |  |  |  |
Debt Instrument, Exit Fee as a Percentage of Outstanding Amounts |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |

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