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The Company and Summary of Significant Accounting Policies (Details Textual) - USD ($)
1 Months Ended 6 Months Ended
Jul. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Accounting Policies [Abstract]      
Revenues   $ 0  
Net proceeds from issuance of common stock $ 24,100,000 6,061,000 $ 6,517,000
Concentrations of credit risk   $ 0