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Debt - Credit Facilities (Details) - USD ($)
Aug. 11, 2020
Sep. 30, 2020
Dec. 31, 2019
Line of Credit Facility [Line Items]      
Credit line borrowings, net of loan origination fees   $ 2,025,000 $ 715,000
Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Borrowing rate     6.75%
Revolving Credit Facility | Inventory Facility      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity on line of credit $ 3,000,000.0    
Percentage of inventory costs used as borrowing capacity 75.00%    
Percentage of inventory value used as borrowing capacity 85.00%    
Borrowing rate 5.75%    
Monthly facility fee 1.00%    
Monthly facility fee, amount $ 18,000    
Credit line borrowings, net of loan origination fees   1,100,000  
Amortized net issuance costs   100,000  
Revolving Credit Facility | Inventory Facility | London Interbank Offered Rate (LIBOR)      
Line of Credit Facility [Line Items]      
Borrowing rate 4.00%    
Revolving Credit Facility | Receivables Facility      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity on line of credit $ 2,500,000    
Monthly facility fee 1.00%    
Monthly facility fee, amount $ 25,000    
Percentage of accounts receivable used as borrowing capacity 90.00%    
Credit line borrowings, net of loan origination fees   900,000  
Amortized net issuance costs   $ 50,000  
Revolving Credit Facility | Receivables Facility | Prime Rate      
Line of Credit Facility [Line Items]      
Borrowing rate 2.00%    
Revolving Credit Facility | Austin Facility      
Line of Credit Facility [Line Items]      
Maximum borrowing capacity on line of credit $ 5,000,000.0    
Overdraft fee 2.00%    
Annual facility fee 1.00%    
Annual facility fee, payment period 3 years    
Collateral management fee 0.50%    
Credit line borrowings, net of loan origination fees     $ 700,000
Payment to close Austin credit facility $ 1,400,000    
Termination fee 100,000    
Write off of remaining issuance costs $ 59,000    
Revolving Credit Facility | Austin Facility | Prime Rate      
Line of Credit Facility [Line Items]      
Margin added to borrowing rate 2.00%