Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash	$ 87,200	$ 15,662
Prepaid expenses and other current assets	3,046	1,832
Total current assets	90,246	17,494
Operating lease right-of-use asset	63
Total assets	90,309	17,494
Current liabilities
Accounts payable	1,038	1,887
Accrued expenses	2,569	1,924
Licenses payable	3,200	125
Convertible debt	4	2,431
Warrant liabilities, at fair value	733	1,062
Operating lease liability	51
Total current liabilities	7,595	7,429
Licenses payable, long-term		200
Operating lease liability, long-term	12
Note payable		147
Convertible debt, long-term	4	7,146
Total liabilities	7,611	14,922
Commitments and contingencies (note 10)
Stockholders’ equity
Common stock, $0.001 par value, 240,000,000 and 120,000,000 shares authorized,          102,271,544 and 54,535,891 issued and outstanding as of          June 30, 2021 and December 31, 2020, respectively	102	54
Additional paid-in-capital	185,732	77,680
Accumulated deficit	(103,136)	(75,162)
Total stockholders’ equity	82,698	2,572
Total liabilities and stockholders’ equity	$ 90,309	$ 17,494