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Stock-Based Compensation Plan - Additional Information (Details) - USD ($)
3 Months Ended 15 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Dec. 19, 2019
Stock Based Compensation Plans [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value $ 19,000   $ 19,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options 800,000   800,000  
Stock-based compensation expense $ 200,000 $ 200,000    
Share-based Compensation Arrangement By Share-based Payment Award, Options Outstanding And Unvested, Weighted Average Remaining Contractual Term 2 years 6 months      
Maximum [Member]        
Stock Based Compensation Plans [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant       660,000
Research and Development Expense [Member]        
Stock Based Compensation Plans [Line Items]        
Stock-based compensation expense $ 21,000 $ 25,000    
General and Administrative Expense [Member]        
Stock Based Compensation Plans [Line Items]        
Stock-based compensation expense     $ 100,000