CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 237,676	$ 370,492
Accounts receivable	2,044	3,367
Prepaid expenses and other current assets	6,960	5,102
Total current assets	246,680	378,961
Property and equipment, net	11,347	5,643
Operating lease right-of-use asset, net	33,519	5,618
Equity-method investment		515
Non-current restricted cash	2,081	2,077
Total assets	293,627	392,814
Current liabilities:
Accounts payable	17,962	10,058
Accrued liabilities	25,529	23,523
Current portion of long-term debt	27,702	22,474
Deferred revenue	4,656	43,482
Total current liabilities	75,849	99,537
Deferred revenue, net of current portion	5,179	19,931
Long-term debt, net of current portion	32,038	40,633
Operating lease liability, net of current portion	31,218	4,502
Other non-current liabilities	3,676
Total liabilities	147,960	164,603
Stockholders’ equity
Common stock, $0.001 par value; 60,000 shares authorized; issued and outstanding shares were 26,492 at September 30, 2022 and 26,372 at December 31, 2021	26	26
Additional paid-in capital	601,129	575,675
Accumulated deficit	(455,488)	(347,490)
Total stockholders’ equity	145,667	228,211
Total liabilities and stockholders’ equity	$ 293,627	$ 392,814