Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows from Operating Activities
Net loss	$ (60,177)	$ (31,684)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	872	866
Loss on disposal of property and equipment		234
Amortization of intangible assets	433	429
Non-cash operating lease expense	1,626	1,528
Stock-based compensation expense	7,910	4,269
Change in fair value of contingent consideration and contingent value rights liabilities	526	(1,038)
Accretion of discounts and amortization of premiums on marketable securities	(1,384)	406
Equity method investment loss	1,861	775
Changes in operating assets and liabilities:
Accounts receivable	(1,353)	7,114
Prepaid expenses and other assets	218	(3,155)
Accounts payable	13	745
Accrued and other liabilities	(33)	(4,191)
Operating lease liabilities	(1,180)	(1,020)
Net cash used in operating activities	(50,668)	(24,722)
Cash Flows from Investing Activities
Purchases of marketable securities	(64,140)	(79,033)
Proceeds from marketable securities	97,500	23,834
Purchases of property and equipment	(927)	(374)
Net cash provided by (used in) investing activities	32,433	(55,573)
Cash Flows from Financing Activities
Proceeds from exercise of stock options and warrants	1,666	2,049
Proceeds from at-the-market-sales agreement, net of issuance costs	19,600
Previously incurred issuance costs related to an underwritten public offering paid during period		(286)
Net cash provided by financing activities	21,266	1,763
Effect of exchange rate changes on cash, cash equivalents and restricted cash	26	308
Net decrease in cash, cash equivalents and restricted cash	3,057	(78,224)
Cash, cash equivalents and restricted cash at beginning of period	117,512	183,798
Cash, cash equivalents and restricted cash at end of period	120,569	105,574
Reconciliation of Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents	118,495	103,500
Restricted cash	2,074	2,074
Total cash, cash equivalents and restricted cash	120,569	105,574
Supplemental Cash Flow Information
Cash paid for amounts included in the measurement of lease liabilities	1,895	1,861
Supplemental Disclosure of Non-Cash Investing and Financing Activities
Purchases of property and equipment included in accounts payable and in accrued and other current liabilities	$ 283	157
Receivable from option exercises		$ 1,325