Note 4 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net patient service revenue	$ 242	$ 0	$ 242	$ 0
Commercial Insurance [Member]
Net patient service revenue	156		156
Medicare [Member]
Net patient service revenue	9		9
Self-Pay [Member]
Net patient service revenue	77		77
Procedures [Member]
Net patient service revenue	90		90
Therapy [Member]
Net patient service revenue	$ 152		$ 152