Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 55,224	$ 85,807
Short-term investments	238,776	16,966
Accounts receivable	7,131	7,052
Tax credit receivable	83	333
Prepaid expenses and other current assets	6,515	1,742
Total current assets	307,729	111,900
Property and equipment, net	4,144	4,079
Other non-current assets	451	3,085
Total assets	312,324	119,064
Current liabilities
Accounts payable	3,140	1,250
Accrued liabilities (Note 5)	7,886	6,922
Total current liabilities	11,026	8,172
Other long-term liabilities (Note 5)	952	912
Total liabilities	11,978	9,084
Commitments and Contingencies (Note 13)
Stockholders’ equity (deficit)
Common stock, $0.0001 par value; 300,000,000 and 181,000,000 shares authorized at September 30, 2020 and December 31, 2019; and 35,465,715 and 1,846,024 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively;	3	1
Additional paid-in capital	399,162
Accumulated deficit	(98,801)	(76,295)
Accumulated other comprehensive loss	(18)	(1)
Total stockholders’ equity (deficit)	300,346	(76,295)
Total liabilities, redeemable convertible preferred stock and stockholders’ equity (deficit)	$ 312,324	119,064
Series A Redeemable Convertible Preferred Stock
Current liabilities
Redeemable convertible preferred stock value		62,468
Series B Redeemable Convertible Preferred Stock
Current liabilities
Redeemable convertible preferred stock value		75,860
Series C Redeemable Convertible Preferred Stock
Current liabilities
Redeemable convertible preferred stock value		$ 47,947