Note 10 - Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2026

Notes Tables

Gain (Loss) on Securities [Table Text Block]

		THREE MONTHS ENDED JUNE 30,								SIX MONTHS ENDED JUNE 30,
		2026				2025				2026				2025
Net gains recognized during the period on marketable securities		$	48,365			$	24,576			$	66,107			$	36,926
Less: Net (gains) losses recognized on marketable securities sold during the period			---				---				(27,948	)			1,507
Net unrealized gains recognized during the reporting period on marketable securities still held at the reporting date		$	48,365			$	24,576			$	38,159			$	38,433

Marketable Securities [Table Text Block]

										Unrealized
		Cost Fair				Value				Gain
Equity securities:
Equity and other mutual funds		$	750,441			$	853,443			$	103,002

Other short-term investments:
U.S. Treasury Bills (original maturities > 3 months)			6,349,613				6,349,613				---

Total marketable securities		$	7,100,054			$	7,203,056			$	103,002

										Unrealized
		Cost				Fair Value				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