Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Equipment Loan (Details)

v3.21.2
Long-Term Debt - Equipment Loan (Details)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 31, 2021
USD ($)
Jul. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
Sep. 30, 2021
USD ($)
advance
Sep. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
May 31, 2021
USD ($)
Debt Instrument [Line Items]                
Principal amount               $ 53,500,000
Repayments of debt         $ 4,997,000    
Facility Two | Equipment loan                
Debt Instrument [Line Items]                
Repayments of debt $ 1,000,000              
Equipment loan                
Debt Instrument [Line Items]                
Principal amount             $ 8,500,000 8,500,000
Effective interest rate during period (as a percent)     2.80%   2.40%      
Principal payments               $ 0
Outstanding balance     $ 5,622,000   $ 5,622,000   $ 2,081,000  
Debt term             3 years  
Equipment loan | Facility One                
Debt Instrument [Line Items]                
Principal amount     $ 5,600,000   $ 5,600,000   $ 800,000  
Variable rate (as a percent)     3.25%   3.25%   3.25%  
Principal payments     $ 800,000   $ 800,000      
Number of advances | advance         7      
Deferred financing costs     $ 200,000   $ 200,000      
Equipment loan | Facility Two                
Debt Instrument [Line Items]                
Principal amount             $ 1,600,000  
Effective interest rate during period (as a percent)     6.50% 8.00% 5.90% 8.00%    
Principal payments   $ 300,000         300,000  
Outstanding balance     $ 0   $ 0   $ 1,300,000  
Interest rate (as a percent)             6.00%  
Equipment loan | Facility Two | Interest Expense                
Debt Instrument [Line Items]                
Deferred loan fees written off to interest expense (less than)     100,000          
Secured equipment loan facility                
Debt Instrument [Line Items]                
Remaining borrowing capacity     2,900,000   2,900,000      
Secured equipment loan facility | Facility One                
Debt Instrument [Line Items]                
Outstanding balance     5,600,000   5,600,000      
Line of credit                
Debt Instrument [Line Items]                
Outstanding balance     3,000,000   3,000,000   $ 0  
Line of credit | Revolving Credit Facility                
Debt Instrument [Line Items]                
Principal amount     $ 10,000,000   $ 10,000,000      
Variable rate (as a percent)     5.75%   5.75%      
Outstanding balance     $ 7,000,000   $ 7,000,000      
Deferred financing costs     $ 100,000   $ 100,000      
Debt term   10 months