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Commitments and Contingencies - Legal Proceedings (Details)
1 Months Ended 12 Months Ended
Oct. 10, 2019
USD ($)
Oct. 01, 2019
USD ($)
Jun. 21, 2019
USD ($)
product
claim
Apr. 30, 2021
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Feb. 10, 2021
Jul. 31, 2020
USD ($)
Apr. 30, 2020
USD ($)
Jan. 31, 2020
USD ($)
Phoenix Navigation Components, LLC Legal Proceedings                      
Loss Contingencies [Line Items]                      
Total damages sought     $ 21,200,000                
Number of deemed trade secrets used | claim     1                
Number of products using deemed trade secrets | product     7                
Royalties owed (as percentage of sale price)     7.50%                
Amount awarded to other party         $ 400,000 $ 400,000 $ 3,800,000        
Reduction of attorneys' fees owed (as a percent)     10.00%                
Royalty payments     $ 1,000,000                
Royalties owed after first $1 million of payments (as a percentage of sale price)     2.25%                
Loss contingency accrual                 $ 100,000 $ 100,000 $ 200,000
Payments for Legal Settlements $ 4,500,000                    
Legal fees             $ 5,700,000        
Phoenix Navigation Components, LLC Legal Proceedings | Trade Secrets                      
Loss Contingencies [Line Items]                      
Number of pending claims | claim     97                
Number of claims settled | claim     5                
Phoenix Navigation Components, LLC Legal Proceedings | Legal Expense                      
Loss Contingencies [Line Items]                      
Amount awarded to other party   $ 3,800,000 $ 3,700,000                
Phoenix Navigation Components, LLC Legal Proceedings | Royalty                      
Loss Contingencies [Line Items]                      
Amount awarded to other party   1,000,000                  
Loss contingency accrual   600,000                  
Phoenix Navigation Components, LLC Legal Proceedings | Interest                      
Loss Contingencies [Line Items]                      
Amount awarded to other party   $ 100,000                  
Resilience Litigation | Resilience Capital                      
Loss Contingencies [Line Items]                      
Total damages sought       $ 1,565,000              
Resilience Litigation | Concord Property                      
Loss Contingencies [Line Items]                      
Lease length in years               15 years