CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net (loss) income	$ (24,333)	$ 25,643
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization expense	4,775	4,061
Stock-based compensation expense	5,374	4,180
Provision adjustments related to credit loss	170	33
Provision adjustments related to product warranty	174	322
(Gain) loss on disposal of property, plant, and equipment	(2,685)	515
Impairment charge	2,956	0
Other	631	(658)
Total non-cash adjustments	11,395	8,453
Changes in operating assets and liabilities:
Accounts receivable and contract assets	19,547	(5,348)
Inventory	6,220	(6,326)
Other assets	(7,124)	(1,500)
Accounts payable	(7,285)	(420)
Contract liabilities	2,650	(164)
Operating lease liabilities - current	(487)	206
Accrued expenses and other current liabilities	2,373	(9,391)
Total change in operating assets and liabilities	15,894	(22,943)
Net cash provided by operating activities	2,956	11,153
Cash flows from investing activities:
Purchase of equipment	(6,565)	(5,358)
Acquisition of business, net of cash acquired	(59,861)	0
Proceeds from future sale of assets	0	834
Proceeds from disposal of property, plant, and equipment	3,729	687
Net cash used in investing activities	(62,697)	(3,837)
Cash flows from financing activities:
Proceeds from borrowings of credit facilities	21,863	0
Payments towards credit facilities	(7,222)	0
Proceeds from employee stock purchase plans and exercise of equity awards	0	844
Proceeds from sale of common stock	29	35,937
Issuance cost associated with sale of common stock	0	(2,796)
Taxes paid related to net share settlement of equity awards	(322)	(260)
Net cash provided by financing activities	14,348	33,725
Effect of exchange rate changes provided by foreign currency	(144)	103
Net increase (decrease) in cash, cash equivalents and restricted cash	(45,537)	41,144
Cash, cash equivalents and restricted cash at beginning of period	71,682	30,538
Cash, cash equivalents and restricted cash at end of period	26,145	71,682
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Cash paid during the period for interest	40	61
Cash paid during the period for income taxes	547	975
NON-CASH INVESTING AND FINANCING ACTIVITIES
Changes in accounts payable related to purchases of equipment	$ (76)	$ 360