Note 10 - Investments in Affiliates and Controlled Investments (Tables)

6 Months Ended

Jun. 30, 2026

Investments in and Advances to Affiliates [Table Text Block]

AFFILIATE/CONTROLLED INVESTMENTS*	VALUE AT 12/31/25		PURCHASE/ MERGER		*INTEREST*		SALES/ MATURITY/ EXPIRATION		REALIZED GAIN (LOSS)		CHANGE IN APPRECIATION/ DEPRECIATION		VALUE 6/30/26		SHARES HELD AT 6/30/26
Medical Devices
IntraOp Medical Corp. Convertible Note*		600		—		—		—		—		793		1,393		10,961,129
IntraOp Medical Corp. Convertible Note*		71		—		—		—		—		94		165		1,300,000
IntraOp Medical Corp. Convertible Note*		28		—		—		—		—		36		63		500,000
IntraOp Medical Corp. Convertible Note*		28		—		—		—		—		36		64		500,000
IntraOp Medical Corp. Convertible Note*		41		—		—		—		—		54		95		750,000
IntraOp Medical Corp. Convertible Note*		28		—		—		—		—		36		64		500,000
IntraOp Medical Corp. Convertible Note*		55		—		—		—		—		72		127		1,000,000
IntraOp Medical Corp. Convertible Note*		28		—		—		—		—		36		63		500,000
IntraOp Medical Corp. Convertible Note*		22		—		—		—		—		29		51		400,000
IntraOp Medical Corp. Term Note*		164		—		—		—		—		217		381		3,000,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		36		64		500,000
IntraOp Medical Corp. Convertible Note*		55		—		—		—		—		72		127		1,000,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		36		64		500,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		36		64		500,000
IntraOp Medical Corp. Convertible Note*		55		—		—		—		—		72		127		1,000,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		37		64		500,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		37		64		500,000
IntraOp Medical Corp. Convertible Note*		27		—		—		—		—		37		64		500,000
IntraOp Medical Corp. Convertible Note*		11		—		—		—		—		14		25		200,000
IntraOp Medical Corp. Convertible Note*		38		—		—		—		—		51		89		700,000
IntraOp Medical Corp. Convertible Note*		8		—		—		—		—		11		19		150,000
IntraOp Medical Corp. Convertible Note*		19		—		—		—		—		25		44		350,000
IntraOp Medical Corp. Preferred Stock*		—		—		—		—				—		—		26,856,187
IntraOp Medical Corp. Term Note*		110		—		—		—		—		145		254		2,000,000
Total Medical Devices	$	1,523		—	$	—	$	—	$	—		2,012		3,535

Semiconductor Equipment
Revasum, Inc. CDIs*(1)		—	—		—	—		—			—				—	39,774,889
Total Semiconductor Equipment	$	—	—	$	—	—	$	—	$	—			$	—		—
Advanced Materials
UCT Coatings, Inc. Common Stock		167,642	—		—	—		—			(26,445	)			141,197	1,500,000

Total Advanced Materials	$	167,642		$	—	—	$	—		$	(26,445	)		$	141,197
Automotive
Wrightspeed, Inc. Common Stock*		—	—		—	—		—			—				—	69,102
Wrightspeed, Inc. Preferred Stock*		—	—		—	—		—			—				—	60,733,693
Total Automotive	$	—	—	$	—	—	$	—		$	—			$	—	—
Total Affiliates and Controlled Investments	$	169,165		$	—	—	$	—		$	(24,433	)		$	144,732
Total Affiliates		167,642			—			—			(26,445	)			141,197
Total Controlled Investments	$	1,523		$	—	—	$	—		$	2,012			$	3,535