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Condensed Statements of Changes in Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Series B Convertible Preferred Stock [Member]    
Stock issuance Costs $ 16 $ 16