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Omnibus Incentive Compensation Plan (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 23, 2015
shares
Aug. 21, 2014
shares
Jul. 22, 2010
shares
Apr. 29, 2008
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share based compensation | $ $ 613 $ 1,156 $ 1,074        
Partnerships Omnibus Incentive Compensation Plan              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Units / Shares authorized (adjusted for the March 2019 Reverse Split) | shares         235,714 114,286 71,429
Partnerships Omnibus Incentive Compensation Plan Employees              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Units granted (adjusted for the March 2019 Reverse Split) | shares       34,286      
Number of annual installments       3      
Vesting date of remaining awards       Dec. 31, 2018      
Partnerships Omnibus Incentive Compensation Plan Non Employees              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Units granted (adjusted for the March 2019 Reverse Split) | shares       87,143      
Number of annual installments       3      
Vesting date of remaining awards       Dec. 31, 2018      
Employee equity compensation              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share based compensation | $ 438 438 439        
Non-Employee equity compensation              
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]              
Share based compensation | $ $ 175 $ 718 $ 635