Note 10 - Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Gain (Loss) on Securities [Table Text Block]

		Three months ended March 31,
		2026				2025
Net gains recognized during the period on marketable securities		$	17,742			$	12,350
Less: Net losses (gains) realized on marketable securities sold during the period			(27,948	)			1,507
Net unrealized (losses) gains recognized during the reporting period on marketable securities still held at the reporting date		$	(10,206	)		$	13,857

Marketable Securities [Table Text Block]

		Cost				Fair Value				Unrealized Gain
Equity securities:
Equity and other mutual funds		$	746,159			$	800,796			$	54,637

Other short-term investments:

U.S. Treasury Bills (original maturities > 3 months)			6,499,593				6,499,593				---
Total marketable securities		$	7,245,752			$	7,300,389			$	54,637

		Cost				Fair Value				Unrealized Gain
Equity securities:
Equity and other mutual funds		$	713,120			$	777,963			$	64,843

Other short-term investments:

U.S. Treasury Bills (original maturities > 3 months)			6,544,683				6,544,683				---
Total marketable securities		$	7,257,803			$	7,322,646			$	64,843