Note 4 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2026

Notes Tables

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]

Significant Unobservable Input		*March 31, 2026*				*September 30, 2025*
ONCO Series D Preferred Stock
Simulation Term (Years)			1.0				1.5
Expected Volatility			70.2	%			72.5	%
Discount Rate			25.0	%			25.0	%
Calibration Discount			0.0	%			48.6	%
ONCO Warrant
Simulation Term (Years)			2.5				3.0
Equity Volatility			72.2	%			68.6	%
Calibration Discount			0.0	%			48.6	%

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

		*Six Months Ended*
		*March 31,*
		*2026*				*2025*
ONCO Series D Preferred Stock
Beginning balance		$	1,764,318			$	—
Change in fair value of equity securities			2,818,551				—
Converted into ONCO common stock			(3,218,257	)			—
Ending balance		$	1,364,612			$	—
ONCO Warrant
Beginning balance		$	760,987			$	—
Change in fair value of equity securities			1,041,659				—
Ending balance		$	1,802,646			$	—

Realized Gain (Loss) on Investments [Table Text Block]

		Three Months Ended								Six Months Ended
		March 31,								March 31,
		2026				2025				2026				2025
Net gains (losses) recognized during the period on equity securities		$	3,931,416			$	—			$	3,811,338			$	(349,078	)
Less: net gains (losses) recognized during the period on equity securities sold during the period			1,954,544				—				2,081,146				(349,078	)
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date		$	1,976,872			$	—			$	1,730,192			$	—

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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