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Convertible Preferred Stock (Details)
$ in Millions
Aug. 13, 2018
USD ($)
shares
Aug. 03, 2018
shares
Jun. 30, 2016
Series A Convertible Preferred Stock      
Convertible Preferred Stock      
Dividend rate (in percentage)     3.00%
Preferred stock dividend shares issued (in shares) 669,489    
Preferred stock dividend shares fair value | $ $ 1.4    
Common Stock      
Convertible Preferred Stock      
Stock issued upon conversion of convertible shares   5,744,586  
Ratio of reverse stock split   0.155814