CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net loss	$ (19,884)	$ (336)	$ (22,397)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	13	85	122
Share-based compensation	6,909	5,143	1,757
Change in fair value of contingent consideration	(52,000)	(56,840)	(11,180)
Intangibles impairment charge	27,764	31,700	0
Net amortization of discounts and premiums on marketable securities	(913)	0	0
Changes in operating assets and liabilities:
Accounts receivable (net)	21,010	(24,493)	0
Other receivables	2,658	0	0
Prepaid expenses and other assets	18,076	(17,964)	(1,304)
Long term prepaid expenses	7,192	0	0
Other assets	123	0	0
Accounts payable	(1,620)	(249)	1,200
Accrued expenses and other liabilities	17,067	(4,424)	(2,035)
Deferred revenue	(1,500)	(1,500)	3,000
Net cash provided by (used in) operating activities	24,895	(68,878)	(30,837)
Cash Flows from Investing Activities:
Purchase of marketable securities	(128,999)	0	0
Proceeds from maturity of marketable securities	75,000	0	0
Disposal of equipment	30
Purchases of equipment		(4)	(8)
Net cash used in investing activities	(53,969)	(4)	(8)
Cash Flows from Financing Activities:
Proceeds from issuance of common stock under ATM Offering, net of issuance costs	0	174,962	37,958
Proceeds from exercises of stock options	1	42	13
Proceeds from exercises of common stock warrants	0	1,126	131
Proceeds from sale of common stock pursuant to ESPP	0	0	11
Net cash provided by financing activities	1	176,129	38,113
Net (decrease) increase in cash, cash equivalents and restricted cash	(29,073)	107,247	7,268
Cash, cash equivalents and restricted cash - beginning of period	162,656	55,409	48,141
Cash, cash equivalents and restricted cash - end of period	133,583	162,656	55,409
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	112,553	162,636	52,389
Short term restricted cash	21,000	0	3,000
Long term restricted cash	30	20	20
Total cash, cash equivalents and restricted cash	133,583	162,656	55,409
Supplemental cash flow disclosure:
Cash paid for amounts included in the measurement of lease liabilities	127	174	154
Supplemental disclosure of non-cash operating activities:
Right-of-use assets obtained in exchange for lease obligations	0	0	290
Supplemental disclosure of non-cash financing activities:
Deemed Dividend on adjustment of exercise price on certain warrants	$ 0	$ 0	$ 147