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Stockholders' Equity - Warrants, Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Mar. 31, 2018
Jun. 30, 2019
Class of Warrant or Right [Line Items]    
Warrants issued $ 24,000  
Warrants to purchase common stock    
Class of Warrant or Right [Line Items]    
Warrants issued   $ 0