CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY AND NONCONTROLLING INTEREST - USD ($) $ in Thousands	Total	Common Shares	Additional paid-in capital	Accumulated deficit	Accumulated Other Comprehensive Income (Loss)	Non- Controlling Interests
Beginning balance (in shares) at Sep. 30, 2023		25,777,169
Beginning 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) income	(15,388)			(15,828)		440
Change in noncontrolling interest	(2,085)		(2,309)			224
Issuance of stock under employee stock plans (in shares)		13,511
Issuance of stock under employee stock plans	1	$ 3	(2)
Stock-based compensation	1,897		1,897
Pension cost amortization	46				46
Foreign currency translation adjustment	1,201				1,201
Ending balance (in shares) at Dec. 31, 2023		25,790,680
Ending balance at Dec. 31, 2023	254,162	$ 6,409	715,282	(469,106)	1,577	0
Beginning balance (in shares) at Sep. 30, 2023		25,777,169
Beginning 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) income	(89,554)
Pension cost amortization	140
Ending balance (in shares) at Jun. 30, 2024		26,006,460
Ending balance at Jun. 30, 2024	182,107	$ 6,463	718,459	(543,272)	457	0
Beginning balance (in shares) at Dec. 31, 2023		25,790,680
Beginning balance at Dec. 31, 2023	254,162	$ 6,409	715,282	(469,106)	1,577	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(48,079)			(48,079)		0
Issuance of stock under employee stock plans (in shares)		114,715
Issuance of stock under employee stock plans	2	$ 29	(27)
Stock-based compensation	1,884		1,884
Pension cost amortization	47				47
Foreign currency translation adjustment	(854)				(854)
Ending balance (in shares) at Mar. 31, 2024		25,905,395
Ending balance at Mar. 31, 2024	207,162	$ 6,438	717,139	(517,185)	770	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(26,087)			(26,087)
Issuance of stock under employee stock plans (in shares)		101,065
Issuance of stock under employee stock plans	8	$ 25	(17)
Stock-based compensation	1,337		1,337
Pension cost amortization	47				47
Foreign currency translation adjustment	(360)				(360)
Ending balance (in shares) at Jun. 30, 2024		26,006,460
Ending balance at Jun. 30, 2024	$ 182,107	$ 6,463	718,459	(543,272)	457	$ 0
Beginning balance (in shares) at Sep. 30, 2024	26,015,129	26,015,129
Beginning balance at Sep. 30, 2024	$ 170,504	$ 6,466	724,789	(562,163)	1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(27,630)			(27,630)
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)		1,520
Issuance of stock under employee stock plans	1		1
Stock-based compensation	1,770		1,770
Pension cost amortization	66				66
Foreign currency translation adjustment	(2,379)				(2,379)
Other (in shares)		801,013
Other	(24)	$ 200	(223)	(1)
Ending balance (in shares) at Dec. 31, 2024		33,717,662
Ending balance at Dec. 31, 2024	$ 169,832	$ 8,391	752,136	(589,794)	(901)
Beginning balance (in shares) at Sep. 30, 2024	26,015,129	26,015,129
Beginning balance at Sep. 30, 2024	$ 170,504	$ 6,466	724,789	(562,163)	1,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(60,073)
Pension cost amortization	$ 206
Ending balance (in shares) at Jun. 30, 2025	34,354,251	34,354,251
Ending balance at Jun. 30, 2025	$ 143,785	$ 8,550	754,723	(622,261)	2,773
Beginning balance (in shares) at Dec. 31, 2024		33,717,662
Beginning balance at Dec. 31, 2024	169,832	$ 8,391	752,136	(589,794)	(901)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(14,866)			(14,866)
Issuance of stock under employee stock plans (in shares)		630,878
Issuance of stock under employee stock plans	27	$ 158	(131)
Stock-based compensation	1,435		1,435
Pension cost amortization	69				69
Foreign currency translation adjustment	1,096				1,096
Other	99		123	(24)
Ending balance (in shares) at Mar. 31, 2025		34,348,540
Ending balance at Mar. 31, 2025	157,692	$ 8,549	753,563	(604,684)	264
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net (loss) income	(17,577)			(17,577)
Issuance of stock under employee stock plans (in shares)		5,711
Issuance of stock under employee stock plans	1	$ 1
Stock-based compensation	1,439		1,439
Pension cost amortization	71				71
Foreign currency translation adjustment	2,438				2,438
Other	$ (279)		(279)
Ending balance (in shares) at Jun. 30, 2025	34,354,251	34,354,251
Ending balance at Jun. 30, 2025	$ 143,785	$ 8,550	$ 754,723	$ (622,261)	$ 2,773