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Note 4 - Notes Receivable and Advances (Details Textual) - USD ($) |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 30, 2026 | Mar. 26, 2026 | Mar. 31, 2026 | Dec. 31, 2025
Sierra Springs Opportunity Fund, Inc. (SSOF) [Member] |  |  |  |
Subsidiary, Ownership Percentage, Noncontrolling Owner |  |  | 40.66% | 16.99%
Conversion of Sierra Springs Advances Into Sierra Springs Common Stock [Member] |  |  |  |
Debt Conversion, Original Debt, Amount | $ 2,000,000 | $ 15,150,000 | $ 15,150,000 |
Debt Conversion, Converted Instrument, Shares Issued (in shares) | 3,076,923 | 23,307,692 | 23,307,692 |
Debt Conversion, Conversion Rate, Price Per Share (in dollars per share) | $ 0.65 | $ 0.65 | $ 0.65 |
Sierra Springs Opportunity Fund, Inc. Note Receivable [Member] |  |  |  |
Payments for Advance to Affiliate |  |  | $ 5,750,000 | $ 9,400,000
Financing Receivable, before Allowance for Credit Loss |  |  | $ 0 | 9,400,000
Note Receivable, Interest Rate |  |  | 4.50% |
Interest Receivable, Current |  |  | $ 237,415 | $ 0

X
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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 + Details
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