Note 7 - Related Party Transactions - Transactions With Related Parties (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Income	$ 1,464	$ 1,108	$ 3,702	$ 2,950
Expense	(1,439)	(988)	(4,909)	(2,820)
Assets	91,972		91,972		$ 46,776
Liabilities	2,245		2,245		1,211
Alpha G Investment Management, Inc. [Member]
Assets	0		0		0
Liabilities	85		85		0
GAMCO Investors, Inc. [Member]
Income	670	177	1,386	891
Expense	0	0	0	0
Assets	84,045		84,045		36,175
Liabilities	0		0		0
Mtron Industries Inc [Member]
Income	0	0	0	0
Expense	40	40	120	48
Assets	0		0		0
Liabilities	338		338		227
Alpha G Investment Management, Inc. [Member]
Income	0	0	0	0
Expense	19	0	85	0
Related Party [Member]
Income	670	177	1,386	891
Expense	59	$ 40	205	$ 48
Assets	84,045		84,045		36,175
Liabilities	$ 423		$ 423		$ 227