CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash and cash equivalents	$ 112,787	$ 56,445
Short-term investments	265,971	166,434
Escrow deposits, current	471	502
Prepaid expenses and other current assets	4,564	4,773
Total current assets	383,793	228,154
Property and equipment, net	69,971	57,967
Operating lease right-of-use assets	24,728	11,854
Restricted cash	1,979	1,717
Escrow deposits, non-current		220
Long-term investments	50,607	135,914
Security deposits	1,506	1,549
Total assets	532,584	437,375
Current liabilities
Accounts payable	4,048	7,596
Accrued expenses and other liabilities	7,246	6,040
Deposit liability	857	980
Long-term debt, current	1,594	1,039
Deferred revenue, current	7,824
Total current liabilities	21,569	15,655
Operating lease liability, long term	30,433	14,559
Deposit liability, non-current	1,220	2,020
Deferred revenue, non-current	112,909
Long-term debt, net	8,501	8,903
Total liabilities	174,632	41,137
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $ 0.0001 par value, 10,000,000 shares authorized at June 30, 2022 and December 31, 2021, respectively, and 0 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively
Common stock, $0.0001 par value, 300,000,000 shares authorized at June 30, 2022 and December 31, 2021, respectively; 57,857,921 and 55,005,523 shares issued and outstanding at June 30, 2022 and December 31, 2021, respectively	6	5
Additional paid-in capital	818,047	785,049
Accumulated deficit	(456,667)	(388,166)
Accumulated other comprehensive loss	(3,434)	(650)
Total stockholders' equity	357,952	396,238
Total liabilities and stockholders' equity	$ 532,584	$ 437,375