Quarterly report pursuant to Section 13 or 15(d)

RELATED PARTY TRANSACTIONS - Narrative (Details)

v3.20.2
RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Mar. 31, 2018
Sep. 30, 2020
Sep. 30, 2019
Jun. 25, 2020
Sep. 30, 2019
Dec. 31, 2019
Related Party Transaction [Line Items]            
Maximum outstanding borrowings       $ 50,000,000    
Outstanding borrowings   $ 0       $ 8,400,000
Wesco US LLC            
Related Party Transaction [Line Items]            
Maximum outstanding borrowings $ 9,000,000.0          
Remaining balance forgiven       3,400,000    
Outstanding borrowings           $ 8,400,000
Interest rate (as a percent)           5.95%
Interest expense     $ 100,000 $ 200,000 $ 400,000  
Wesco US LLC | LIBOR            
Related Party Transaction [Line Items]            
Basis spread on variable rate (as a percent) 4.00%          
Watermill            
Related Party Transaction [Line Items]            
Due to related parties   900,000        
Repayments of related party debt   $ 200,000