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Dividends (Details) - USD ($)
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Dividends (Textual)    
Initial dividend rate 6.50%  
Increase in dividend rate on default of payment 7.50%  
Increase in dividend rate on two consecutive default of payment 10.00%  
Series A convertible preferred stock outstanding (in shares) 13,602 13,602
Amount of arrears dividend $ 238,000  
Series A preferred stock has a liquidation preference (in dollars per share) $ 25.00  
Percentage of weighted average of common stock sales price 95.00%  
Percentage of preferred stock outstanding 6.50%