Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 84,330	$ 10,607
Short-term marketable debt securities	10,284	51,793
Prepaid expenses and other current assets	5,722	1,786
Total current assets	100,336	64,186
Property and equipment, net	2,790	2,121
Operating lease right-of-use asset	23,066
Goodwill	20,089
In-process research and development	1,190
Restricted cash	4,527	4,282
Long-term marketable debt securities		10,588
Other non-current assets	1,837	410
Total assets	153,835	81,587
Current liabilities:
Accounts payable	1,552	1,052
Contract liabilities—related party, current	13,980	10,993
Accrued and other current liabilities	5,732	2,820
Operating lease liability	1,215
Total current liabilities	22,479	14,865
Contract liabilities—related party, net of current portion		10,890
Deferred rent, net of current portion		234
Operating lease liability, net of current portion	20,424
Redeemable convertible preferred stock warrant liability		1,881
Contingent consideration liability	980
Deferred tax liability	125
Total liabilities	44,008	27,870
Commitments and contingencies (Note 12)
Stockholders’ equity (deficit):
Preferred stock, value
Common stock, $0.0001 par value; 150,000,000 and 140,200,938 shares authorized as of December 31, 2020 and 2019, respectively; 19,677,249 and 2,155,578 shares issued and outstanding as of December 31, 2020 and 2019, respectively	2
Additional paid-in capital	216,126	9,258
Accumulated deficit	(106,325)	(69,647)
Accumulated other comprehensive income	24	23
Total stockholders’ equity (deficit)	109,827	(60,366)
Total liabilities, redeemable convertible preferred stock, and stockholders’ equity (deficit)	$ 153,835	81,587
Redeemable Convertible Preferred Stock
Stockholders’ equity (deficit):
Preferred stock, value		$ 114,083