Note 11 - Rhode Island Acquisition - Pro Forma Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues	$ 6,999,000	$ 5,134,000	$ 19,271,000	$ 15,627,000
Operating income	(889,000)	$ 90,000	(975,000)	$ (137,000)
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member]
Revenues	2,635,000		4,527,000
Operating income	$ 188,000		800,000
Revenue			22,701,000
Operating income			$ 510,000
Diluted earnings per share (in dollars per share)			$ 0.09