Note 3 - Discontinued Operations - Schedule of Disposal Groups - Non-cash Items (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Impairment of Long-Lived Assets to be Disposed of	$ 24,000		$ 24,187	$ 0
B Medical Systems Business [Member] \| Discontinued Operations, Held-for-Sale [Member]
Impairment of goodwill	0	$ 111,317	0	111,317
Impairment of Long-Lived Assets to be Disposed of	24,187	0	24,187	0
B Medical Systems Business [Member] \| Discontinued Operations, Held-for-Sale [Member] \| Discontinued Operations [Member]
Depreciation and amortization	0	7,733	3,846	14,952
Capital expenditures	371	751	1,128	1,997
Impairment of goodwill	0	111,317	0	111,317
Impairment of Long-Lived Assets to be Disposed of	$ 24,187	$ 0	$ 24,187	$ 0

Amount of impairment of intangible assets (including goodwill) attributable to disposal group, including, but not limited to, discontinued operation.

No definition available.

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- Definition

Amount of capital expenditure attributable to discontinued operations.

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-Topic 205
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Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.

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-Topic 230
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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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