Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT AND WARRANT LIABILITY - Amendments (Details)

v3.21.1
LONG-TERM DEBT AND WARRANT LIABILITY - Amendments (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2018
Jan. 31, 2018
Jan. 31, 2017
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Mar. 18, 2020
Nov. 14, 2017
Jan. 03, 2017
Debt Instrument [Line Items]                            
Debt discount         $ 4,725,000       $ 4,725,000 $ 5,894,000        
Write-off of deferred loan costs and discount         0 $ 1,523,000 $ 0 $ 376,000 1,899,000          
Amortization of debt issuance costs and discounts                 2,396,000 $ 1,667,000 $ 1,418,000      
Maximum allowable loan advances                         $ 5,000,000.0  
Syndicate of Lenders | Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity                           $ 225,000,000.0
Syndicate of Lenders | Term Loan | Line of Credit                            
Debt Instrument [Line Items]                            
Face amount of debt       $ 200,000,000.0 397,500,000       397,500,000         200,000,000.0
Additional borrowings $ 0 $ 130,000,000.0 $ 67,500,000                      
Debt discount 0 300,000 400,000 3,700,000       0     300,000      
Write-off of deferred loan costs and discount       1,800,000                    
Amortization of debt issuance costs and discounts 400,000 1,200,000 800,000                      
Capitalized incremental deferred finance costs 2,700,000 100,000 700,000 3,300,000       $ 2,700,000     $ 100,000      
Syndicate of Lenders | Revolving Credit Facility | Line of Credit                            
Debt Instrument [Line Items]                            
Maximum borrowing capacity       25,000,000.0 25,000,000.0       25,000,000.0     $ 25,000,000.0   25,000,000.0
Goldman Sachs Specialty Lending Group | Term Loan | Line of Credit                            
Debt Instrument [Line Items]                            
Face amount of debt       $ 80,000,000.0 $ 80,000,000.0       $ 80,000,000.0         $ 80,000,000.0
Additional borrowings $ 0 $ 0 $ 0