CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 99,776	$ 65,921
Restricted cash	490	566
Accounts receivable	743	6,895
Receivable research incentives	17,300	14,271
Prepaid expenses and other current assets	11,302	14,482
Total current assets	129,611	102,135
Non-current assets:
Restricted cash	410	425
Property, plant and equipment, net	16,516	16,352
Operating lease right of use assets	4,037	5,673
Finance lease right of use assets	0	90
Other non-current assets	952	1,370
Total non-current assets	21,915	23,910
Total assets	151,526	126,045
Current liabilities
Accounts payable	7,824	8,762
Deferred revenues	7,520	5,538
Operating lease liabilities, current	1,558	1,682
Accrued expenses and other current liabilities	7,757	8,880
Loans payable, current	1,393	2,792
Total current liabilities	26,052	27,654
Non-current liabilities
Loans payable, non-current	800	2,219
Operating lease liabilities, non-current	2,462	3,911
Deferred revenues, non-current	6,807	21
Other non-current liabilities	2,057	2,648
Total non-current liabilities	12,126	8,799
Total liabilities	38,178	36,453
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.0001 par value; 10,000,000 shares authorized at September 30, 2022 and December 31, 2021, respectively; Series A convertible preferred stock, 2,978 shares designated, 1,697 shares outstanding at September 30, 2022 and December 31, 2021, respectively; Series A-1 convertible preferred stock, 15,800 shares and no shares designated, 15,800 shares and no shares outstanding at September 30, 2022 and December 31, 2021, respectively	0	0
Additional paid-in capital	396,348	317,135
Accumulated other comprehensive loss	(7,635)	(4,780)
Accumulated deficit	(275,370)	(222,766)
Total stockholders' equity	113,348	89,592
Total liabilities and stockholders' equity	151,526	126,045
Common stock
Stockholders' equity:
Common stock	5	3
Class A common stock
Stockholders' equity:
Common stock	$ 0	$ 0