BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 63,741	$ 13,453
Marketable securities	81,658	153,582
Accounts receivable, net - related party	3,260
Inventory, net	2,383	2,584
Income tax receivable	697	697
Other receivables	496	455
Prepaid expenses	16,267	2,519
Restricted cash	408
Total current assets	168,910	173,290
Operating lease right-of-use assets	1,551	2,973
Marketable securities, non-current	11,350	69,754
Property and equipment, net	426	631
Restricted cash, non-current		408
Total assets	182,237	247,056
Current liabilities:
Accounts payable and accrued expenses	21,540	15,861
Operating lease liabilities, current	1,918	1,755
Total current liabilities	23,458	17,616
Operating lease liabilities, non-current		1,918
Commitments and contingencies (Note 18)
Stockholders' equity:
Preferred stock; $0.001 par value; 5,000,000 shares authorized at December 31, 2022 and December 31, 2021, zero shares issued and outstanding at December 31, 2022 and December 31, 2021
Common stock; $0.001 par value; 100,000,000 shares authorized at December 31, 2022 and December 31, 2021, 53,797,341 shares and 53,480,812 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively	53	53
Additional paid-in capital	726,630	708,585
Accumulated deficit	(566,232)	(480,758)
Accumulated other comprehensive loss	(1,672)	(358)
Total stockholders' equity	158,779	227,522
Total liabilities and stockholders' equity	$ 182,237	$ 247,056