CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 26,820	$ 32,650	$ 51,773	$ 74,886
Cost of revenue	23,109	23,633	45,003	50,072
Gross profit	3,711	9,017	6,770	24,814
Operating expense:
Selling, general, and administrative	9,951	7,563	19,895	14,750
Research and development	5,797	4,535	11,148	9,162
Severance	(17)	20	458	1,318
Loss (gain) on sale of assets	24	(788)	(1,147)	(601)
Total operating expense	15,755	11,330	30,354	24,629
Operating (loss) income	(12,044)	(2,313)	(23,584)	185
Other (expense) income:
Interest expense, net	(222)	(12)	(463)	(23)
Foreign exchange gain (loss)	46	(17)	121	25
Other income	46	0	153	0
Total other (expense) income	(130)	(29)	(189)	2
(Loss) income before income tax (expense) benefit	(12,174)	(2,342)	(23,773)	187
Income tax (expense) benefit	(54)	117	(148)	2
Net (loss) income		(2,225)	(23,921)	189
Foreign exchange translation adjustment	8	2	55	22
Comprehensive (loss) income	$ (12,220)	$ (2,223)	$ (23,866)	$ 211
Per share data:
Net (loss) income per basic share (in dollars per share)	$ (0.27)	$ (0.06)	$ (0.58)	$ 0.01
Weighted-average number of basic shares outstanding (in shares)	45,240	37,217	41,356	37,082
Net (loss) income per diluted share (in dollars per share)	$ (0.27)	$ (0.06)	$ (0.58)	$ 0.01
Weighted-average number of diluted shares outstanding (in shares)	45,240	37,217	41,356	38,384