CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenue	$ 24,953	$ 42,236
Cost of revenue	21,894	26,439
Gross profit	3,059	15,797
Operating expense:
Selling, general, and administrative	9,944	7,187
Research and development	5,351	4,627
Severance	475	1,298
(Gain) loss on sale of assets	(1,171)	187
Total operating expense	14,599	13,299
Operating (loss) income	(11,540)	2,498
Other (expense) income:
Interest expense, net	(241)	(11)
Foreign exchange gain	75	42
Other income	107	0
Total other (expense) income	(59)	31
(Loss) income before income tax expense	(11,599)	2,529
Income tax expense	(94)	(115)
Net (loss) income	(11,693)	2,414
Foreign exchange translation adjustment	47	20
Comprehensive (loss) income	$ (11,646)	$ 2,434
Per share data:
Net (loss) income per basic share (in dollars per share)	$ (0.31)	$ 0.07
Weighted-average number of basic shares outstanding (in shares)	37,557	36,950
Net (loss) income per diluted share (in dollars per share)	$ (0.31)	$ 0.06
Weighted-average number of diluted shares outstanding (in shares)	37,557	39,031