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Redeemable Preferred Units - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2020
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Jun. 04, 2020
Dec. 31, 2019
Temporary Equity [Line Items]              
Redeemable preferred units, shares authorized             430
Redeemable preferred units, shares issued             430
Redeemable preferred units, shares outstanding             430
Redeemable preferred units, stated value per unit             $ 100,000
Redeemable preferred units, carrying value             $ 43,000,000
Non-convertible Redeemable Preferred Units              
Temporary Equity [Line Items]              
Redeemable preferred units, shares authorized             430
Redeemable preferred units, shares issued             430
Redeemable preferred units, shares outstanding             430
Redeemable preferred units, stated value per unit             $ 100,000
Redeemable preferred units, carrying value             $ 43,000,000
Redeemable preferred units, liquidation value             43,000,000
Redeemable preferred units, preferred dividend rate       10.50%      
Redeemable preferred units, value       $ 150,000,000      
Redeemable preferred units, accrued preferred dividends   $ 900,000 $ 1,300,000 2,100,000 $ 2,500,000    
Non-convertible Redeemable Preferred Units | Initial Public Offering              
Temporary Equity [Line Items]              
Redeemable preferred units, accrued preferred dividends   $ 900,000          
Redeemable preferred units, preferred dividends outstanding           $ 3,200,000  
Redeemable preferred units, accrued preferred dividends converted to interests $ 2,300,000            
Non-convertible Redeemable Preferred Units | Accrued Expenses and Other Current Liabilities              
Temporary Equity [Line Items]              
Redeemable preferred units, cumulative accrued but unpaid dividends             $ 1,200,000
Non-convertible Redeemable Preferred Units | Maximum              
Temporary Equity [Line Items]              
Redeemable preferred units, maximum preferred dividend       $ 5,000,000