CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 100,444	$ 178,872
Marketable securities	177,188	197,676
Interest receivable	794	349
Accounts receivable	3,678	6,013
Prepaid expenses and other current assets	18,223	15,859
Total current assets	300,327	398,769
Marketable securities, non-current	29,845	88,169
Property and equipment, net	63,531	51,523
Intangible assets	50,729	53,760
Goodwill	37,552	39,702
Operating lease right-of-use assets	62,002	73,181
Other non-current assets	17,023	15,319
Restricted cash	1,500	1,500
Total assets	562,509	721,923
Current liabilities:
Accounts payable	22,418	9,759
Other accrued liabilities	16,007	11,577
Accrued compensation and employee benefits	21,506	20,840
Deferred revenues	51,780	85,711
Total current liabilities	111,711	127,887
Deferred revenues, non-current	109,377	166,776
Long-term portion of lease liabilities	38,986	44,055
Deferred income tax	6,270	6,645
Other non-current liabilities	1,207	1,217
Total liabilities	267,551	346,580
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value, 5,000,000 shares authorized, and no shares issued or outstanding	0	0
Common stock, $0.01 par value; 320,000,000 shares authorized; 166,793,320 and 145,921,530 shares issued and outstanding at December 31, 2022 and 2021, respectively	1,668	1,459
Additional paid-in capital	1,450,239	1,334,138
Accumulated deficit	(1,148,545)	(956,267)
Accumulated other comprehensive loss	(8,404)	(3,987)
Total stockholders’ equity	294,958	375,343
Total liabilities and stockholders’ equity	$ 562,509	$ 721,923