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Note 2 - Summary of Significant Accounting Policies (Details Textual) |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 28, 2025 USD ($) | Apr. 14, 2025 USD ($) | Mar. 28, 2025 USD ($) | Mar. 26, 2025 USD ($) | Feb. 15, 2025 USD ($) | Feb. 10, 2025 USD ($) | Nov. 08, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) shares | Dec. 31, 2023 USD ($) shares | Feb. 14, 2025 USD ($) | Dec. 31, 2022 USD ($)
Retained Earnings (Accumulated Deficit) |  |  |  |  |  |  |  | $ (249,014,000) | $ (270,035,000) | $ (249,014,000) |  |
Noncash Stock Compensation, Amortization and Impairment Charges |  |  |  |  |  |  |  |  | 3,900,000 | 17,300,000 |  |
Net Cash Provided by (Used in) Operating Activities |  |  |  |  |  |  |  |  | (11,462,000) | (15,489,000) |  |
Cash and Cash Equivalents, at Carrying Value |  |  |  |  |  |  |  | 7,609,000 | 1,310,000 | 7,609,000 |  |
Contract with Customer, Asset, after Allowance for Credit Loss |  |  |  |  |  |  |  | 546,000 | 372,000 | 546,000 |  | $ 1,013,000
Contract with Customer, Liability |  |  |  |  |  |  |  | 339,000 | 50,000 | 339,000 |  | $ 111,000
Contract with Customer, Liability, Revenue Recognized |  |  |  |  |  |  |  |  | 289,000 | 111,000 |  |
Advertising Expense |  |  |  |  |  |  |  |  | $ 101,000 | $ 134,000 |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  | 5 years |  |  |
Number of Reporting Units |  |  |  |  |  |  |  |  | 1 |  |  |
Number of Reportable Segments |  |  |  |  |  |  |  |  | 1 | 1 |  |
Reporting Unit, Fair Value Amount |  |  |  |  |  |  |  | 29,100,000 | $ 27,000,000 | $ 29,100,000 |  |
Reporting Unit, Carrying Amount |  |  |  |  |  |  |  | 10,000,000 | 170,000 | 10,000,000 |  |
Payments of Financing Costs |  |  |  |  |  |  |  |  | 343,000 | 2,735,000 |  |
Debt Financing Costs Expensed As Incurred |  |  |  |  |  |  |  |  | 180,000 | 0 |  |
Difference From Fair Value of New Preferred Stock and Carrying Value of Original Preferred Stock |  |  |  |  |  |  |  | 0 |  |  |  |
Unrecognized Tax Benefits |  |  |  |  |  |  |  | 0 | 0 | 0 |  |
Series AA Convertible Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock, Convertible, Down Round Feature, Increase (Decrease) in Equity, Amount |  |  |  |  |  |  |  |  | $ (0) | $ (7,567,000) |  |
Common Stock Underlying All Outstanding Stock Option, Restricted Stock Units and Warrants [Member] |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  |  |  |  |  |  |  |  | 3,652,000 | 2,250,000 |  |
Common Stock Potentially Issuable in Connection With Conversion of Outstanding Preferred Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  |  |  |  |  |  |  |  | 10,117,000 | 12,127,000 |  |
Common Stock Potentially Issuable in Connection With The Exercise of Outstanding Additional Investment Rights [Member] |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares |  |  |  |  |  |  |  |  | 8,414,000 | 1,682,000 |  |
Prepaid Expenses and Other Current Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Deferred Costs, Current |  |  |  |  |  |  |  | $ 282,000 | $ 64,000 | $ 282,000 |  |
Computer Software, Intangible Asset [Member] |  |  |  |  |  |  |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  | 3 years |  |  |
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  | 3 years |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  | 3 years |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  |  |  |  |  |  |  | 5 years |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  |  |  |  |  |  |  | 10 years |  |  |
Transferred at Point in Time [Member] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Revenue |  |  |  |  |  |  |  |  | 47.00% | 24.00% |  |
Transferred over Time [Member] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of Revenue |  |  |  |  |  |  |  |  | 53.00% | 76.00% |  |
Subsequent Event [Member] | Equity Purchase Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Equity Offering, Maximum Amount |  |  |  |  |  |  |  |  |  |  | $ 2,900,000 |
Agile II Note [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  | 224 days |  |  |  |  |  |
Agile Loan Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  |  |  | $ 1,850,000 |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  |  |  | 42.00% |  |  |  |  |
Debt Instrument, Term |  |  |  |  |  |  | 196 days |  |  |  |  |
Agile Loan Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  |  | $ 1,500,000 | $ 1,500,000 |  |  |  |  |  |
Agile and Agile II [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from (Repayments of) Debt |  |  |  |  |  | $ 875,000 |  |  |  |  |  |
Diagonal Note [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 300,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 10.00% |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  | $ 279,000 |  |  |  |  |  |  |  |
Debt Instrument, Default, Interest Rate |  |  |  | 22.00% |  |  |  |  |  |  |  |
Belleau Purchase Agreement [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt | $ 600,000 | $ 600,000 |  |  |  |  |  |  |  |  |  |
Belleau Purchase Agreement [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 1,500,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 20.00% |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 12 months |  |  |  |  |  |  |  |  |
Debt Instrument, Default, Interest Rate |  |  | 20.00% |  |  |  |  |  |  |  |  |

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