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Long-term Debt - Stifel Bank Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 29, 2020
Oct. 31, 2020
Sep. 30, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Subsequent Event [Line Items]            
Proceeds from debt     $ 15,000,000      
Prepayment premium fee       $ 2,496,000 $ 0 $ 0
Loss on debt extinguishment       (1,119,000) $ 0 $ 0
Loan Agreement            
Subsequent Event [Line Items]            
Facility amount   $ 50,000,000        
Debt amount   50,000,000        
Minimum unrestricted cash and cash equivalents   20,000,000        
Maximum unrestricted cash and cash equivalents   60,000,000        
Debt default rate 5.00%          
Loan Agreement | Term Loan            
Subsequent Event [Line Items]            
Aggregate principal amount   50,000,000        
Proceeds from debt       $ 49,000,000    
Debt pay off   46,674,000        
Prepayment premium fee   305,000        
Debt interest   365,000        
Facility fee   2,191,000        
Loss on debt extinguishment   $ (1,119,000)        
Percentage of revenue for debt repayment   80.00%        
Stated interest rate       4.75%    
Loan Agreement | Term Loan | Prime Rate | Rate Scenario One            
Subsequent Event [Line Items]            
Variable interest rate   0.75%        
Loan Agreement | Term Loan | Prime Rate | Rate Scenario Two            
Subsequent Event [Line Items]            
Variable interest rate   4.75%        
Loan Agreement | Secured Revolving Credit Facility | Line of Credit            
Subsequent Event [Line Items]            
Facility amount   $ 50,000,000        
Loan Agreement | Secured Revolving Credit Facility | Line of Credit | Prime Rate | Rate Scenario One            
Subsequent Event [Line Items]            
Variable interest rate   0.50%        
Loan Agreement | Secured Revolving Credit Facility | Line of Credit | Prime Rate | Rate Scenario Two            
Subsequent Event [Line Items]            
Variable interest rate   4.75%        
Loan Agreement | Letter of Credit | Line of Credit            
Subsequent Event [Line Items]            
Facility amount   $ 2,000,000        
Success Fee Agreement | Line of Credit            
Subsequent Event [Line Items]            
Percent of original principal threshold   0.75%        
Redemption amount   $ 375,000