Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Common stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	200,000,000	50,000,000
Common stock, shares issued (in shares)	10,634,245	1,099,270
Common stock, shares outstanding (in shares)	10,634,245	1,099,270
Series A Preferred Stock
Preferred stock par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	0	30,000,000
Preferred stock, shares issued (in shares)	0	4,443,259
Preferred stock, shares outstanding (in shares)	0	4,443,259
Preferred Stock, Liquidation Preference, Value		$ 39,990