Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 410,046	$ 58,976
Prepaid expenses and other current assets	3,011	2,747
Total current assets	413,057	61,723
Property and equipment, net	2,753	3,391
Other assets	438	584
Total assets	416,248	65,698
Current liabilities:
Accounts payable	2,556	3,376
Accrued compensation	731	414
Accrued manufacturing expenses	26,285	5,777
Accrued expenses (including related party accrual of $102 and $15 as of June 30, 2020 and December 31, 2019, respectively)	3,297	1,305
Deferred rent — current portion	25	19
Lease liability — current portion		161
Total current liabilities	32,894	11,052
Deferred rent — long-term portion	8	17
Redeemable convertible preferred stock warrant liability		450
Other liabilities	136	242
Total liabilities	33,038	11,761
Commitments and contingencies (Note 5)
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock value		160,310
Stockholders' Equity (Deficit)
Common stock, $0.001 par value — 66,000,000 and 52,000,000 shares authorized as of June 30, 2020 and December 31, 2019, respectively, 50,881,698 and 4,059,909 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	54	7
Additional paid-in capital	539,965	2,967
Accumulated deficit	(156,809)	(109,347)
Total stockholders' equity (deficit)	383,210	(106,373)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	$ 416,248	65,698
Series A Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock value		24,967
Series B Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock value		55,151
Series C Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock
Redeemable convertible preferred stock value		$ 80,192