XML 49 R39.htm IDEA: XBRL DOCUMENT v3.21.2
Organization and Nature of Business; Basis of Presentation; Principles of Consolidation; Significant Accounting Policies - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 15, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Dec. 31, 2020
Jun. 30, 2021
Sep. 03, 2020
Jun. 30, 2020
Apr. 14, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]                    
Allowance for credit losses   $ (214,000) $ (290,000) $ (214,000) $ (445,000) $ (213,000)   $ (141,000)   $ 0
Impairment charges       $ 0 $ 0          
Instrument warranty term       1 year            
Kits and accessories warranty term       60 days            
Restructuring expenses     $ 400,000              
Lease extension   1 year   1 year            
Lessor lease term   5 years   5 years            
Expected dividends   0.00% 0.00% 0.00%            
Unsecured obligations | PPP Loan                    
Property, Plant and Equipment [Line Items]                    
Aggregate principal amount                 $ 4,800,000  
Full forgiveness $ 4,800,000                  
Interest rate   1.00%   1.00%     1.00%      
Unsecured obligations | 2.50% Convertible notes due 2023                    
Property, Plant and Equipment [Line Items]                    
Aggregate principal amount   $ 125,500,000   $ 125,500,000            
Interest rate   2.50%   2.50%            
Instruments                    
Property, Plant and Equipment [Line Items]                    
Estimated useful life of assets       5 years            
Minimum                    
Property, Plant and Equipment [Line Items]                    
Estimated useful life of assets       1 year            
Lease term   2 years   2 years            
Maximum                    
Property, Plant and Equipment [Line Items]                    
Estimated useful life of assets       7 years            
Lease term   6 years   6 years