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Debt - 2019 Refinancing Agreement (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 01, 2021
Jan. 01, 2020
Oct. 01, 2019
USD ($)
Jul. 31, 2021
Mar. 31, 2020
Jun. 30, 2019
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
covenant
shares
Aug. 31, 2020
Dec. 31, 2019
USD ($)
Nov. 30, 2019
USD ($)
Apr. 30, 2019
USD ($)
Apr. 12, 2019
$ / shares
shares
Nov. 30, 2018
USD ($)
Debt Instrument [Line Items]                            
Percentage of number of shares               2.00%            
Expense (income) recorded on change in fair value of warrant liability               $ 1,634,000   $ (588,000)        
Gain on embedded derivative               $ 0   $ 388,000        
2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Debt issued                       $ 40,000,000.0    
Debt instrument, interest rate, effective percentage               13.00%   13.00%        
Amortization of debt issuance costs             $ 1,000,000.0 $ 1,400,000   $ 700,000        
Line of credit facility, unused capacity, commitment fee percentage             2.00%              
Make-whole premium prepayment period             19 months              
Make-whole provision applicable to interest period             18 months              
Number of financial covenants | covenant               2            
Leverage ratio     330.00%   425.00% 425.00% 400.00%   461.00%          
Leverage ratio minimum requirement                 4.00          
Debt instrument, interest rate, increase (decrease)   1.00%                        
Time until expiration (years)                         5 years  
Warrants and rights outstanding               $ 900,000            
Derivative liability               400,000   0.0        
Debt instrument, unamortized discount                   1,300,000        
Debt issuance costs, net                   3,900,000        
Interest expense, debt               500,000   300,000        
Expense (income) recorded on change in fair value of warrant liability               1,600,000   (600,000)        
Gain on embedded derivative               $ 400,000            
2019 Refinancing Amendment Number One and Waiver                            
Debt Instrument [Line Items]                            
Line of credit facility, maximum borrowing capacity     $ 15,000,000                      
Line of credit facility, unused capacity, commitment fee percentage               50.10%            
Leverage ratio     330.00%   425.00%                  
Debt instrument, interest rate, increase (decrease)     3.00%                      
Debt instrument, percentage of customer accounts required to approve amendment     75.00%                      
Debt instrument, non refundable waiver fee               $ 400,000            
Debt instrument, non refundable amendment fee               1,000,000            
Refinancing Term Loan 2019                            
Debt Instrument [Line Items]                            
Collateral coverage amount               37,900,000            
Debt outstanding               39,000,000            
Debt outstanding balance in excess of collateral coverage amount               1,100,000            
2019 Refinancing Term Loan embedded derivative                            
Debt Instrument [Line Items]                            
Debt outstanding               $ 0            
Number of warrants per each share of common stock (in shares) | shares               0         263,314  
Warrant exercise price (in usd per share) | $ / shares                         $ 7.63  
Refinancing Agreement 2019 First Amendment                            
Debt Instrument [Line Items]                            
Debt issuance costs, net                   $ 1,400,000        
Minimum | 2019 Refinancing Amendment Number One and Waiver                            
Debt Instrument [Line Items]                            
Debt instrument, liquidity of loan parties                     $ 10,000,000      
LIBOR Rate | 2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Basis spread over variable rate               11.00%            
LIBOR Rate | Minimum | 2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Basis spread over variable rate               2.00%            
Base Rate | 2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Basis spread over variable rate               10.00%            
Base Rate | Minimum | 2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Basis spread over variable rate               3.00%            
Forecast | 2019 Refinancing Agreement                            
Debt Instrument [Line Items]                            
Leverage ratio 200.00%     200.00%                    
Forecast | 2019 Refinancing Amendment Number One and Waiver                            
Debt Instrument [Line Items]                            
Leverage ratio 200.00%                          
Revolving Credit Facility                            
Debt Instrument [Line Items]                            
Line of credit facility, maximum borrowing capacity                           $ 25,000,000.0