CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (73,642)	$ (121,563)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	27,872	25,894
Amortization of intangibles	26,350	25,470
Non-cash stock-based compensation	17,643	20,009
Non-cash operating lease expense	6,860	7,375
Amortization of convertible debt discount	2,015	1,989
Amortization of debt issuance costs	139	136
Loss on disposal of assets, net	334	3,066
Impairment of assets	1,703	0
Gain on sale of assets held for sale	0	(2,048)
Other adjustments	122	1,428
Changes in assets and liabilities, net
Accounts receivable, net	(12,928)	136
Inventories	(252)	(403)
Prepaid and other assets	(5,165)	(3,605)
Operating lease liabilities	(5,871)	(7,086)
Deferred income tax liabilities, net	(9,380)	(12,781)
Accrued compensation	7,453	(313)
Accounts payable and other liabilities	(2,990)	(12)
Net cash used in operating activities	(19,737)	(62,308)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of marketable securities	(6,756)	(73,973)
Proceeds from maturities of marketable securities	87,963	89,812
Purchases of property and equipment	(21,695)	(26,357)
Proceeds from assets held for sale	0	12,098
Net cash provided by investing activities	59,512	1,580
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of equipment financing obligations	(66)	(706)
Issuance of common stock, net	3,350	10,733
Net cash provided by financing activities	3,284	10,027
Net change in cash and cash equivalents	43,059	(50,701)
Cash and cash equivalents, beginning of period	263,180	316,827
Cash and cash equivalents, end of period	306,239	266,126
Supplemental disclosure of cash flow information:
Interest paid	2,121	2,145
Income taxes paid, net	175	155
Supplemental disclosure of non-cash investing and financing information:
Purchases of property and equipment included in accounts payable	$ 636	$ 1,144