Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Cash flows from operating activities
Net loss	$ (15,432)	$ (10,992)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	13,648	18,100
Loss on assets held for sale	9,696	0
Inventory write-downs and other asset write-offs	(305)	1,470
Stock-based compensation	4,058	5,112
Amortization and accretion on marketable securities	(374)	(541)
Deferred income taxes	(5,788)	657
Loss on disposals of property, plant and equipment	(42)	(8)
Changes in operating assets and liabilities:
Accounts receivable	723	4,850
Inventories	(9,729)	(7,622)
Accounts payable	4,572	(2,602)
Deferred revenue	3,195	10,462
Accrued warranty and retrofit costs	(248)	173
Accrued compensation and tax withholdings	(5,158)	(637)
Accrued restructuring costs	249	(566)
Other assets and liabilities	21,782	11,942
Net cash provided by operating activities	20,847	29,798
Cash flows from investing activities
Purchases of property, plant and equipment	(6,192)	(7,750)
Purchases of marketable securities	(108,692)	(40,754)
Sales and maturities of marketable securities	142,656	125,590
Deposit received for the sale of B Medical Systems business	9,000	0
Net cash provided by investing activities	36,772	77,086
Cash flows from financing activities
Payments of finance leases	(214)	(215)
Withholding tax payments on net share settlements on equity awards	(2,418)	0
Excise tax payment for settled share repurchases	0	(4,911)
Net cash used in financing activities	(2,632)	(5,126)
Net increase in cash, cash equivalents and restricted cash	55,301	93,447
Cash, cash equivalents and restricted cash, beginning of period	296,685	320,990
Cash, cash equivalents and restricted cash, end of period	351,986	414,437
Effects of exchange rate changes on cash, cash equivalents and restricted cash	314	(8,311)
Supplemental disclosures:
Cash paid / (received) for income taxes, net	2,098	(6,148)
Purchases of property, plant and equipment included in accounts payable and accrued expenses	$ 5,703	$ 3,249