CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue	$ 97,716	$ 45,318
Cost of revenue	74,323	41,252
Gross profit	23,393	4,066
Operating expense:
Selling, general, and administrative	32,731	28,224
Research and development	17,910	13,782
Impairment	22,612	2,956
Severance	27	140
Gain on sale of assets	(1,147)	0
Total operating expense	72,133	45,102
Operating loss	(48,740)	(41,036)
Other (expense) income:
Interest expense, net	(751)	(35)
Foreign exchange loss	(1)	0
Other income	121	171
Total other (expense) income	(631)	136
Loss from continuing operations before income tax (expense) benefit	(49,371)	(40,900)
Income tax (expense) benefit from continuing operations	(42)	139
Net loss from continuing operations	(49,413)	(40,761)
(Loss) income from discontinued operations including loss on disposal of $9.6 million, net of tax benefit of $0	(25,946)	16,428
Net loss	(75,359)	(24,333)
Pension adjustment	(91)	441
Comprehensive loss	$ (75,450)	$ (23,892)
Per share data:
Net loss on continuing operations per basic share (in dollars per share)	$ (0.96)	$ (1.09)
Net loss on continuing operations per diluted share (in dollars per share)	(0.96)	(1.09)
Net (loss) income on discontinued operations per basic share (in dollars per share)	(0.50)	0.44
Net (loss) income on discontinued operations per diluted share (in dollars per share)	(0.50)	0.44
Net loss per basic share (in dollars per share)	(1.46)	(0.65)
Net loss per diluted share (in dollars per share)	$ (1.46)	$ (0.65)
Weighted-average number of basic shares and preferred warrants outstanding (in shares)	51,510	37,269
Weighted-average number of diluted shares and preferred warrants outstanding (in shares)	51,510	37,269