CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities:
Net loss	$ (52,604)	$ (54,430)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	4,042	5,867
Depreciation and amortization expense	2,698	3,412
Other non-cash items	(12)	34
Changes in operating assets and liabilities:
Accounts receivable	5,405	2,754
Receivable research incentives	(5,383)	(3,687)
Prepaid expenses and other current assets	1,743	(8,371)
Other non-current assets	251	(437)
Accounts payable	1,588	528
Deferred revenues	10,323	(1,952)
Operating lease liabilities	(1,223)	(1,392)
Accrued expenses and other liabilities	(254)	5,298
Other non-current liabilities	292	(397)
Net cash provided by (used in) operating activities	(33,134)	(52,773)
Investing activities:
Purchases of property and equipment	(4,418)	(7,440)
Net cash used in investing activities	(4,418)	(7,440)
Financing activities:
Payments related to finance leases	(24)	(64)
Proceeds from issuance of convertible preferred stock, net of issuance costs	29,625	239
Proceeds from issuance of common stock, net of issuance costs	45,691
Repayments of borrowings	(2,825)	0
Net cash provided by financing activities	72,467	175
Net increase (decrease) in cash, cash equivalents and restricted cash	34,915	(60,038)
Cash, cash equivalents and restricted cash at beginning of period	66,912	143,177
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(1,151)	(442)
Cash, cash equivalents and restricted cash at end of period	100,676	82,697
Supplemental disclosure of cash flow information:
Cash paid for interest	(21)	(24)
Cash paid for income taxes	(1)	(1)
Supplemental disclosure of non-cash financing activities:
Property and equipment additions in accounts payable and accrued expenses	(239)	(3,950)
Lease assets obtained in exchange for new operating lease liabilities	$ 227
Lease assets derecognized upon lease cancellation		$ 16