Note 7 - Related Party Transactions (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Related Party Transactions [Table Text Block]

	Three Months Ended September 30,
	2025				2024
	Income		Expense		Income		Expense
GAMCO Investors, Inc.	$	177	$	—	$	444	$	—
M-tron Industries, Inc.		—		40		—		(15	)
Total	$	177	$	40	$	444	$	(15	)

	Nine Months Ended September 30,
	2025				2024
	Income		Expense		Income		Expense
GAMCO Investors, Inc.	$	891	$	—	$	1,293	$	—
M-tron Industries, Inc.		—		48		—		(44	)
Total	$	891	$	48	$	1,293	$	(44	)

	September 30, 2025				December 31, 2024
	Assets		Liabilities		Assets		Liabilities
GAMCO Investors, Inc.	$	35,515	$	—	$	34,242	$	—
M-tron Industries, Inc.		—		196		—		59
Total	$	35,515	$	196	$	34,242	$	59