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Basis of Presentation and General Information - Schedule of Subsidiaries (Details)
$ in Thousands
1 Months Ended
Jun. 30, 2018
USD ($)
shares
Subsidiary, Sale of Stock [Line Items]  
Cumulative redeemable perpetual preferred equity | $ $ 16,875
Series A Preferred Stock | Private Placement  
Subsidiary, Sale of Stock [Line Items]  
Number of shares issued in transaction (in shares) | shares 100