Note 3 - Discontinued Operations - Schedule of Disposal Groups (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Loss on assets held for sale	$ 9,696	$ 0
Loss from discontinued operations, net of tax	(10,242)	(3,919)
B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member]
Disposal group, revenue	13,103	17,591
Disposal group, cost of revenue	11,968	14,728
Gross profit	1,135	2,863
Research and development	1,601	1,635
Selling, general and administrative	3,369	6,187
Loss on assets held for sale	9,696	0
Restructuring charges	116	314
Total operating expenses	14,782	8,136
Operating loss	(13,647)	(5,273)
Interest income (expense), net	1	5
Other income (expense), net	417	530
Loss before income taxes	(13,229)	(4,738)
Income tax benefit	(3,384)	(819)
Loss from discontinued operations, net of tax	(9,845)	(3,919)
B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member] | Product [Member]
Disposal group, revenue	11,014	14,288
Disposal group, cost of revenue	9,318	11,422
B Medical Systems Business [Member] | Discontinued Operations, Held-for-Sale [Member] | Service [Member]
Disposal group, revenue	2,089	3,303
Disposal group, cost of revenue	$ 2,650	$ 3,306