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	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)					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