CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 36,455	$ 27,742
Available-for-sale securities	112,292	26,568
Accounts receivable from related party	11,402	1,237
Prepaid expenses and other current assets	4,042	2,281
Total current assets	164,191	57,828
Available-for-sale securities, long-term	13,547
Property and equipment, net	5,611	6,337
Other assets	1,128	3,120
Total assets	184,477	67,285
Current liabilities:
Accounts payable	4,012	2,131
Accrued expenses and other current liabilities	7,712	5,665
Deferred collaboration liability, current	8,118	10,968
Deferred rent and lease incentive obligation, current	696	610
Total current liabilities	20,538	19,374
Long-term liabilities:
Deferred collaboration liability, long term	16,431	4,177
Deferred rent and lease incentive obligation, long term	4,208	4,901
Other long-term liabilities	1,611	523
Total liabilities	42,788	28,975
Commitments and contingencies (Note 7)
Convertible preferred stock		93,091
Stockholders’ (deficit) equity:
Common stock, $0.001 par value; 200,000,000 shares authorized, 24,964,520 shares issued and 24,951,983 shares outstanding at December 31, 2021; 115,000,000 shares authorized, 573,793 shares issued and 521,052 shares outstanding at December 31, 2020	25	1
Additional paid-in capital	356,308	107,908
Accumulated other comprehensive loss	(132)	(1)
Accumulated deficit	(214,512)	(162,689)
Total stockholders’ equity (deficit)	141,689	(54,781)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 184,477	67,285
Series A convertible preferred stock
Long-term liabilities:
Convertible preferred stock		16,176
Series B convertible preferred stock
Long-term liabilities:
Convertible preferred stock		5,700
Series C convertible preferred stock
Long-term liabilities:
Convertible preferred stock		16,759
Series D convertible preferred stock
Long-term liabilities:
Convertible preferred stock		$ 54,456