Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income (loss)	$ 242,641	$ (55,146)
Less: Income from operations of discontinued operations, net of tax	400,499	36,673
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock-based compensation	16,658	20,881
Amortization of premium on investment debt securities	716	3,384
Amortization of deferred financing costs	2,242	1,990
Write-off of fixed assets	2,400
Depreciation	491	2,430
Non-cash operating lease cost	1,435	3,541
Accretion of debt discount		21,885
Loss (gain) on early extinguishment of debt	91,739	(16,511)
Gain on lease termination	(1,101)
Provision for allowance on credit losses		(8)
Changes in operating assets:
Accounts receivable	2,169	(518)
Prepaid expenses and other current assets	442	648
Inventory	232	190
Security deposits	3,157	345
Other assets	32
Changes in operating liabilities:
Accounts payable, accrued expenses and other current liabilities	13,791	(26,003)
Operating lease liabilities	(1,479)	(4,550)
Interest payable	(6,357)	(2,021)
Net cash used in operating activities - continuing operations	(31,291)	(86,136)
Net cash provided by operating activities - discontinued operations	9,317	39,895
Net cash used in operating activities	(21,974)	(46,241)
Cash flows from investing activities:
Purchases of investment debt securities	(401,069)	(278,438)
Sales and maturities of investment debt securities	355,485	334,233
Purchases of equipment, leasehold improvements, and furniture and fixtures	(865)	(397)
Net cash (used in) provided by investing activities - continuing operations	(46,449)	55,398
Net cash provided by investing activities - discontinued operations	363,233
Net cash provided by investing activities	316,784	55,398
Cash flows from financing activities:
Payments for repurchases of convertible senior notes	(261,562)	57
Proceeds from exercise of options, net	433	18
Payments of employee withholding taxes related to stock-based awards	(480)	(1,589)
Payments of debt issuance costs	(35)
Payments for repurchase of common stock		(75,825)
Proceeds from issuance of Notes		117,551
Proceeds from terminations of capped call options		(38,129)
Net cash (used in) provided by financing activities - continuing operations	(261,644)	2,083
Net cash (used in) provided by financing activities	(261,644)	2,083
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(7,399)	71
Net increase in cash, cash equivalents and restricted cash	25,767	11,311
Cash, cash equivalents and restricted cash at beginning of period	94,409	65,654
Cash, cash equivalents and restricted cash at end of period	120,176	76,965
Less: Cash, cash equivalents and restricted cash of discontinued operations		1,622
Cash, cash equivalents and restricted cash of continuing operations	$ 120,176	$ 75,343