Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 208,842	$ 120,027
Accounts receivable	31,926
Prepaid expenses and other current assets	1,450	4,100
Total current assets	242,218	124,127
Property and equipment, net	8,206	10,100
Right-of-use assets	59,821	59,102
Restricted cash	5,031	5,037
Long-term deposit and other assets	1,647	725
Total assets	316,923	199,091
Current liabilities:
Accounts payable	3,394	2,912
Accrued expenses and other current liabilities	8,304	6,838
Operating lease liability, current portion	4,209	3,681
Deferred revenue, current portion	19,211	3,874
Total current liabilities	35,118	17,305
Deferred revenue, net of current portion	7,644
Operating lease liability, net of current portion	53,808	53,013
Long-term debt and accrued interest	29,722	29,290
Other long term liabilities	24	49
Total liabilities	126,316	99,657
Commitments and contingencies (Note 6)
Stockholders' equity:
Additional paid-in capital	395,589	257,810
Accumulated deficit	(204,987)	(158,379)
Total stockholders' equity	190,607	99,434
Total liabilities and stockholders' equity	316,923	199,091
Voting Common Stock
Stockholders' equity:
Common stock	4	2
Non-voting Common Stock
Stockholders' equity:
Common stock	$ 1	$ 1