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Acquisition (Details 1) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jan. 04, 2019
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Trade Names        
Business Acquisition [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   11 years 11 years  
Customer Lists        
Business Acquisition [Line Items]        
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   15 years 15 years  
Gaomei        
Business Acquisition [Line Items]        
Business Acquisition, Name of Acquired Entity Hefei Gaomei Cleaning Machines Co., Ltd. and Anhui Rongen Environmental Protection Technology Co., Ltd. (collectively "Gaomei")      
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 0.0      
Business Combination, Working Capital Adjustment     $ (0.2)  
Recorded Unconditional Purchase Obligation       $ 11.3
Purchase Obligation, Due in Second Year     11.3  
Gaomei | Minimum        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration, Liability 1.4      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   10 years    
Gaomei | Maximum        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration, Liability 3.1      
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life   15 years    
Fair Value | Contingent Consideration        
Business Acquisition [Line Items]        
Business Combination, Contingent Consideration, Liability $ 4.7 $ 2.1 $ 2.1