Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows from operating activities
Net loss	$ (158,375)	$ (166,748)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	20,810	11,562
Deferred tax liability	0	(11,177)
Impairment of property and equipment and other assets	3,620	0
Non-cash lease expense	1,040	2,594
Stock-based compensation	18,531	60,616
Change in fair value of acquisition consideration	(5,913)	(13,071)
Other non cash adjustment	(33)	987
Changes in assets and liabilities:
Accounts receivable, net	(2,508)	(10,284)
Inventories	2,949	(11,237)
Prepaid expenses and other current assets	(1,935)	(2,736)
Other non-current assets	1,050	6,829
Accounts payable	(4,431)	466
Accrued expenses	1,278	608
Accrued compensation	348	5,519
Other liabilities	1,799	2,954
Net cash used in operating activities	(121,770)	(123,118)
Cash flows from investing activities
Purchases of property and equipment	(25,386)	(85,395)
Business acquisition, net of cash acquired	0	(8,160)
Purchases of investments	(58,255)	(217,639)
Proceeds from maturity of investments	136,500	75,481
Net cash (used in) provided by investing activities	52,859	(235,713)
Cash flows from financing activities
Proceeds from exercise of stock options	1,208	4,764
Proceeds from public offerings, net of underwriting discounts, commissions and offering expenses	0	269,824
Proceeds from issuance of common stock under employee stock purchase plan	2,536	2,394
Repayments of long-term debt	0	(1,558)
Repurchases of common stock for income tax withholding	(3,275)	(6,130)
Net cash provided by financing activities	469	269,294
Effect of exchange rates on cash, cash equivalents and restricted cash	21	(1)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(68,421)	(89,538)
Cash, cash equivalents, and restricted cash at beginning of period	380,259	467,359
Cash, cash equivalents, and restricted cash at end of period	311,838	377,821
Supplemental disclosure of cash flow information
Interest paid	0	9
Income taxes paid, net of refunds	241	130
Non-cash investing and financing activities
Property and equipment additions included in accounts payable and accrued expenses	1,686	6,562
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	4,215	19,494
Issuance of common stock in connection with the business acquisition	5,860	77,122
Conversion of convertible notes	$ 3,711	$ 0