CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional paid-in capital	Accumulated deficit	Accumulated Other Comprehensive (Loss) Income	Non- Controlling Interests
Beginning balance (in shares) at Sep. 30, 2022		25,598,289
Beginning balance at Sep. 30, 2022	$ 359,766	$ 6,362	$ 707,787	$ (348,277)	$ (5,500)	$ (606)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net loss	(105,140)			(104,902)		(238)
Noncontrolling interest	(292)					(292)
Issuance of stock under employee stock plans (in shares)		178,880
Issuance of stock under employee stock plans	109	$ 44	65
Stock based compensation	7,844		7,844
Actuarial loss (net of tax)	(28)				(28)
Foreign currency translation adjustment	5,315				5,315
Cumulative currency translation realized through sale of subsidiary	762				762
Other	154			(99)	(219)	472
Ending balance (in shares) at Sep. 30, 2023		25,777,169
Ending balance at Sep. 30, 2023	268,490	$ 6,406	715,696	(453,278)	330	(664)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net loss	(108,445)			(108,885)		440
Noncontrolling interest	(2,085)		(2,309)			224
Issuance of stock under employee stock plans (in shares)		237,960
Issuance of stock under employee stock plans	11	$ 60	(49)
Stock based compensation	6,740		6,740
Actuarial loss (net of tax)	0
Pension cost amortization	188				188
Foreign currency translation adjustment	894				894
Cumulative currency translation realized through sale of subsidiary	0
Other	(57)		(57)
Warrants issued in connection with Purchase Agreement	$ 4,768		4,768
Ending balance (in shares) at Sep. 30, 2024	26,015,129	26,015,129
Ending balance at Sep. 30, 2024	$ 170,504	$ 6,466	724,789	(562,163)	1,412	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net loss	(68,625)			(68,625)
Issuance of common shares (in shares)		6,900,000
Issuance of common shares	27,524	$ 1,725	25,799
Issuance of stock under employee stock plans (in shares)		641,109
Issuance of stock under employee stock plans	31	$ 160	(129)
Stock based compensation	6,028		6,028
Actuarial loss (net of tax)	578				578
Pension cost amortization	279				279
Foreign currency translation adjustment	(41)				(41)
Cumulative currency translation realized through sale of subsidiary	0
Other (in shares)		801,013
Other	$ (250)	$ 200	(425)	(25)
Ending balance (in shares) at Sep. 30, 2025	34,357,251	34,357,251
Ending balance at Sep. 30, 2025	$ 136,028	$ 8,551	$ 756,062	$ (630,813)	$ 2,228	$ 0