Note 8 - Income Taxes - Components of Income Tax Expense (Benefits) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Federal									$ 208	$ 42
State and local									(24)	177
Total current tax expense									184	219
Federal									(19)	83
State and local									12	(1)
Total before change in valuation allowance									(7)	82
Change in valuation allowance									0	0
Net deferred tax (benefit) expense									(7)	82
Income tax expense	$ 17	$ 48	$ 76	$ 36	$ 169	$ 69	$ (2)	$ 65	$ 177	$ 301