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Significant Accounting Policies - Additional Information (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2019
USD ($)
segment
Sep. 30, 2019
segment
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Accounting Policies [Line Items]          
Number of principal reporting segments | segment 2 3 2    
Restricted cash $ 0   $ 0 $ 0  
Options          
Accounting Policies [Line Items]          
Award vesting period (years)     5 years    
Minimum          
Accounting Policies [Line Items]          
Estimated useful lives     3 years    
Maximum          
Accounting Policies [Line Items]          
Estimated useful lives     25 years    
Option term (years)     10 years    
Rental Equipment          
Accounting Policies [Line Items]          
Accumulated depreciation relating to rental equipment $ 14,600,000   $ 18,000,000.0 14,600,000  
Selling, General and Administrative expenses          
Accounting Policies [Line Items]          
Advertising expense     10,100,000 12,200,000 $ 11,800,000
Product development and engineering costs     $ 12,400,000 $ 12,000,000.0 $ 10,400,000