Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net loss	$ (41,824)	$ (45,563)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	5,292	3,150
Deferred tax liability	0	(10,545)
Non-cash lease expense	254	1,174
Stock-based compensation	(2,325)	18,108
Change in fair value of acquisition consideration	(4,135)	(2,826)
Other non cash adjustments	287	395
Changes in assets and liabilities:
Accounts receivable, net	(4,098)	(2,032)
Inventories	(5,281)	(8,436)
Prepaid expenses and other current assets	(1,177)	(91)
Other non-current assets	499	3,231
Accounts payable	3,282	(5)
Accrued expenses	(1,254)	445
Accrued compensation	(3,716)	(3,624)
Other liabilities	126	(34)
Net cash used in operating activities	(54,070)	(46,653)
Cash flows from investing activities
Purchases of property and equipment	(11,824)	(12,783)
Business acquisition, net of cash acquired	0	(8,160)
Purchases of investments	(22,647)	(217,639)
Proceeds from maturity of investments	27,500	12,000
Net cash used in investing activities	(6,971)	(226,582)
Cash flows from financing activities
Proceeds from exercise of stock options	604	3,105
Proceeds from (repayments of) long-term debt	0	(1,558)
Repurchases of common stock for income tax withholding	(999)	(2,558)
Net cash used in financing activities	(395)	(1,011)
Effect of exchange rates on cash, cash equivalents and restricted cash	268	83
Net decrease in cash, cash equivalents, and restricted cash	(61,168)	(274,163)
Cash, cash equivalents, and restricted cash at beginning of period	380,259	467,359
Cash, cash equivalents, and restricted cash at end of period	319,091	193,196
Supplemental disclosure of cash flow information
Interest paid	0	9
Income taxes paid, net of refunds	52	91
Non-cash investing and financing activities
Property and equipment additions included in accounts payable and accrued expenses	4,520	11,479
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	0	10,423
Issuance of common stock in connection with the business acquisition	$ 0	$ 72,514