CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (84,711)	$ 53,759
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
Depreciation	16,921	13,629
Amortization of intangibles	16,979	6,209
Non-cash stock-based compensation	15,729	7,159
Non-cash operating lease expense	4,989	3,750
Amortization of convertible debt discount	1,324	1,247
Amortization of debt issue costs	91	88
Gain on investment in and loan receivable from non-consolidated affiliate, net	0	(91,510)
Interest receivable on loan receivable from non-consolidated affiliate	0	(391)
Gain on sale of assets held for sale	(2,048)	0
Write-off of COVID-19 PCR testing inventory and equipment	0	6,061
Other adjustments	1,602	790
Changes in assets and liabilities, net
Accounts receivable, net	854	1,155
Inventories	1,533	3,645
Prepaid lease asset	0	(4,730)
Prepaid and other assets	(2,202)	(4,681)
Accounts payable, operating lease liabilities, deferred taxes, accrued and other liabilities	(17,097)	4,640
Net cash (used in) provided by operating activities	(46,036)	820
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of marketable securities	(56,332)	(162,769)
Proceeds from sales and maturities of marketable securities	68,525	26,253
Purchases of property and equipment	(18,513)	(37,178)
Proceeds from assets held for sale	12,098	0
Business acquisitions, net of cash acquired	0	(419,404)
Loan receivable from non-consolidated affiliate	0	(15,000)
Net cash provided by (used in) investing activities	5,778	(608,098)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayment of equipment financing obligations	(574)	(1,892)
Issuance of common stock, net	7,642	8,045
Proceeds from issuance of convertible debt, net of issuance costs	0	334,410
Premiums paid for capped call confirmations	0	(29,291)
Proceeds from equity offering, net of issuance costs	0	418,273
Net cash provided by financing activities	7,068	729,545
Net change in cash, cash equivalents and restricted cash	(33,190)	122,267
Cash, cash equivalents and restricted cash, beginning of period	316,827	250,632
Cash, cash equivalents and restricted cash, end of period	283,637	372,899
Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets:
Cash and cash equivalents	283,637	368,796
Restricted cash, non-current	0	4,103
Total cash, cash equivalents and restricted cash	283,637	372,899
Supplemental disclosure of cash flow information:
Interest paid	2,143	1,329
Income taxes paid, net	129	114
Supplemental disclosure of non-cash investing and financing information:
Fair value of common stock issued to fund business acquisition	0	29,174
Equity offering issuance costs included in accrued expenses	0	10,137
Purchases of property and equipment included in accounts payable	$ 1,529	$ 3,822