Note 10 - Commitments and Contingencies (Details Textual) |
12 Months Ended | |||
|---|---|---|---|---|
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Dec. 31, 2024
USD ($)
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Dec. 31, 2023
USD ($)
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Oct. 01, 2020
ft²
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Mar. 31, 2020
USD ($)
|
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| Operating Lease, Weighted Average Remaining Lease Term (Year) | 2 years 9 months | 3 years 9 months | ||
| Operating Lease, Weighted Average Discount Rate, Percent | 6.00% | 6.00% | ||
| Operating Lease, Right-of-Use Asset | $ 226,704 | $ 298,485 | ||
| Operating Lease, Liability | 279,312 | 365,712 | ||
| Cash | 1,731,155 | |||
| Estimated Litigation Liability | $ 450,000 | |||
| PDN China [Member] | ||||
| Cash | 0 | 184,055 | ||
| Office Lease [Member] | ||||
| Area of Real Estate Property (Square Foot) | ft² | 4,902 | |||
| Lessee, Operating Lease, Term of Contract (Year) | 84 years | |||
| Operating Lease, Payments | $ 106,000 | $ 104,000 | ||
| X | ||||||||||
- Definition Area of a real estate property. No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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