Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash	$ 76,833	$ 15,662
Prepaid expenses and other current assets	4,062	1,832
Total current assets	80,895	17,494
Operating lease right-of-use asset	51
Total assets	80,946	17,494
Current liabilities
Accounts payable	3,401	1,887
Accrued expenses	3,725	1,924
Licenses payable	200	125
Convertible debt		2,431
Warrant liabilities, at fair value	657	1,062
Operating lease liability	51
Total current liabilities	8,034	7,429
Licenses payable, long-term		200
Note payable		147
Convertible debt, long-term		7,146
Total liabilities	8,034	14,922
Commitments and contingencies (note 10)
Stockholders’ equity
Common stock, $0.001 par value, 240,000,000 and 120,000,000 shares authorized,          102,354,699 and 54,535,891 issued and outstanding as of          September 30, 2021 and December 31, 2020, respectively	102	54
Additional paid-in-capital	186,761	77,680
Accumulated deficit	(113,951)	(75,162)
Total stockholders’ equity	72,912	2,572
Total liabilities and stockholders’ equity	$ 80,946	$ 17,494