CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities:
Net income (loss)	$ 111,997	$ (172,415)
Income (loss) from discontinued operations, net of income taxes	110,923	(93,110)
Net income (loss) from continuing operations	1,074	(79,305)
Adjustments to reconcile net income (loss) to net cash used in continuing operating activities:
Depreciation and amortization	1,193	736
Share-based payment compensation costs	11,572	18,125
Make-whole payment accretion	(354)
Other	(40)	720
Changes in operating assets and liabilities:
Prepaid and other current assets	620	(1,125)
Other assets	(7,636)
Accounts payable	(1,211)	(1,062)
Accrued expenses and other current liabilities	4,262	4,639
Other non-current liabilities	(121)	2,139
Total adjustments	8,285	24,172
Net cash used in continuing operating activities	9,359	(55,133)
Cash flows from continuing investing activities:
Payment for patent related costs	(355)	(2,189)
Purchase of fixed assets		(34)
Net cash provided by (used in) continuing investing activities	(355)	(2,223)
Cash flows from continuing financing activities:
Proceeds from sale of common stock, net of costs	2,454	184,115
Proceeds from exercise of options and warrants		322
Proceeds from sale of common stock related to employee stock purchase plan	14	233
Repayments of debt	(219,432)	(50,000)
Proceeds from Series A Preferred Stock, net of transaction costs	21,684
Repurchase of Preferred Stock at liquidation preference	(38,657)
Proceeds from make-whole derivative	3,322
Repayment of make-whole derivative	(2,969)
Payment of debt financing fees	(1,622)	(5,118)
Net cash (used in) provided by continuing financing activities	(235,206)	129,552
Discontinued operations:
Net cash used in operating activities	(13,437)	(87,560)
Net cash provided by investing activities	223,834	0
Net cash provided by financing activities	0	0
Net cash provided by (used in) discontinued operations	210,397	(87,560)
Net decrease in cash	(15,805)	(15,364)
Cash and restricted cash - continuing operations, beginning of period	64,907	79,019
Cash and restricted cash - discontinued operations, beginning of period	215	1,467
Total cash and restricted cash, end of period	49,317	65,122
Supplemental disclosure of cash flow information:
Interest paid	13,545	$ 25,068
Supplemental disclosure of noncash financing activities:
Warrants issued in relation to debt financing agreement	$ 2,727