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Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Feb. 12, 2018
Statement of Financial Position [Abstract]      
Preferred stock, par value (in dollars per share) $ 0.00001 $ 0.00001 $ 0.00001
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000 10,000,000
Preferred stock, shares issued (in shares) 0 0  
Preferred stock, shares outstanding (in shares) 0 0  
Common stock, par value (in dollars per share) $ 0.00001 $ 0.00001 $ 0.00001
Common stock, shares authorized (in shares) 100,000,000 100,000,000 100,000,000
Common stock, shares, issued (in shares) 33,562,665 27,274,991  
Common stock, shares, outstanding (in shares) 33,562,665 27,274,991