Quarterly report pursuant to Section 13 or 15(d)

Equity and Mezzanine Equity - Antidilutive Securities Excluded From Calculation of Earnings Per Share (Details)

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Equity and Mezzanine Equity - Antidilutive Securities Excluded From Calculation of Earnings Per Share (Details) - shares
9 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Series B Preferred Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Preferred stock, shares outstanding (in shares) 1,875,748 1,875,848
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares 1,172,343  
Series D Preferred Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Preferred stock, shares outstanding (in shares) 3,600,636  
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares 5,307,541  
Warrants to purchase Common Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares 329,378  
Common units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 295,550  
Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares 295,550