Note 4 - Note Receivable (Details Textual) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Mar. 31, 2025 |
Dec. 31, 2024 |
|
| Financing Receivable, after Allowance for Credit Loss, Current | $ 0 | $ 100,000 | |
| LiNiCo [Member] | |||
| Investment Owned, Balance, Shares (in shares) | 2,000,000 | ||
| Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount | $ 1,400,000 | ||
| Financing Receivable, after Allowance for Credit Loss, Current | $ 600,000 | $ 100,000 |
| X | ||||||||||
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Number of shares of investment owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amortized cost, after allowance for credit loss, of financing receivable classified as current. Excludes net investment in lease. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|