Note 3 - Discontinued Operations - Schedule of Disposal Groups (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Loss from discontinued operations, net of tax	$ (3,919)	$ (8,532)
B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member]
Disposal group, revenue	17,591	12,592
Disposal group, cost of revenue	14,728	12,824
Gross profit	2,863	(232)
Research and development	1,635	1,180
Selling, general and administrative	6,187	8,687
Restructuring charges	314	334
Total operating expenses	8,136	10,201
Operating loss	(5,273)	(10,433)
Interest income, net	5	127
Other income, net	530	164
Loss before income taxes	(4,738)	(10,142)
Income tax benefit	(819)	(1,610)
Loss from discontinued operations, net of tax	(3,919)	(8,532)
Product [Member] | B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member]
Disposal group, revenue	14,288	9,686
Disposal group, cost of revenue	11,422	10,056
Service [Member] | B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member]
Disposal group, revenue	3,303	2,906
Disposal group, cost of revenue	$ 3,306	$ 2,768