CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities:
Net loss	$ (33,778)	$ (7,460)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization expense	6,496	3,292
Stock-based compensation expense	4,982	3,755
Provision adjustments related to credit loss	25	187
Provision adjustments related to product warranty	(57)	174
Gain on disposal of property, plant, and equipment	(1,147)	(1,919)
Other	124	299
Total non-cash adjustments	10,423	5,788
Changes in operating assets and liabilities:
Accounts receivable and contract assets	(7)	7,306
Inventory	(2,158)	3,380
Other assets	(2,000)	(5,263)
Accounts payable	(1,230)	(4,706)
Contract liabilities	(3,941)	2,650
Operating lease liabilities - current	527	(487)
Accrued expenses and other liabilities	5,729	6,941
Total change in operating assets and liabilities	(3,080)	9,821
Net cash (used in) provided by operating activities	(26,435)	8,149
Cash flows from investing activities:
Purchase of equipment	(2,026)	(4,743)
Proceeds from disposal of property, plant, and equipment	10,915	2,820
Acquisition of business, net of cash acquired	96	(2,439)
Net cash provided by (used in) investing activities	8,985	(4,362)
Cash flows from financing activities:
Proceeds from borrowings from line of credit	393	0
Payments towards line of credit	(3,507)	0
Payments towards note payable	(639)	0
Proceeds from sale of common stock	15,437	0
Proceeds from employee stock purchase plans and exercise of equity awards	0	29
Taxes paid related to net share settlement of equity awards	(161)	(307)
Net cash provided by (used in) financing activities	11,523	(278)
Effect of exchange rate changes provided by foreign currency	(6)	(62)
Net (decrease) increase in cash, cash equivalents, and restricted cash	(5,933)	3,447
Cash, cash equivalents, and restricted cash at beginning of period	26,145	71,682
Cash, cash equivalents, and restricted cash at end of period	20,212	75,129
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	932	40
Cash paid during the period for income taxes	120	547
NON-CASH INVESTING AND FINANCING ACTIVITIES
Changes in accounts payable related to purchases of equipment	$ (373)	$ (76)