Note 11 - Rhode Island Acquisition - Major Classes of Assets and Liabilities (Details) - USD ($)			3 Months Ended		6 Months Ended
	May 07, 2024	Nov. 10, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Cash and cash equivalents			$ 14,236,000	$ 13,676,000	$ 14,236,000	$ 13,676,000	$ 13,690,000
Operating Lease, Right-of-Use Asset			631,000		631,000		57,000
Total assets acquired			60,825,000		60,825,000		48,162,000
Deferred income taxes			(1,472,000)		(1,472,000)		(63,000)
Gain on bargain purchase			(3,679,000)	$ 0	(3,679,000)	0
Lease liabilities			(1,857,000)		(1,857,000)
Base purchase consideration			28,473,000		28,473,000		$ 21,883,000
Non-controlling interest			(2,100,000)		(2,100,000)	0
CT Sim					(2,399,000)	$ (2,561,000)
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member]
Cash and cash equivalents	$ 3,388,000
Accounts Receivable, after Allowance for Credit Loss	919,000
Property, plant, and equipment			7,100,000		7,100,000
Operating Lease, Right-of-Use Asset	1,835,000
Unfavorable leasehold interest	(1,227,000)
Total assets acquired	12,015,000
Accounts payable	(150,000)
Deferred income taxes	(1,226,000)
Gain on bargain purchase	(3,679,000)				(3,679,000)
Lease liabilities	(1,835,000)
Base purchase consideration	5,125,000
Non-controlling interest	(2,100,000)
CT Sim	(175,000)
Business Combination, Consideration Transferred	2,850,000	$ 2,850,000
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member] | Medical Equipment [Member]
Property, plant, and equipment	2,403,000		4,697,000		4,697,000
Southern New England Regional Cancer Center, LLC and Roger Williams Radiation Therapy, LLC [Member] | Medical Facilities [Member]
Property, plant, and equipment	$ 4,697,000		$ 2,403,000		$ 2,403,000