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Summary of Significant Accounting Policies (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
Mar. 31, 2020
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
reportingunit
segment
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Summary Of Significant Accounting Policies [Line Items]            
Cash equivalents $ 0     $ 0   $ 0
Inventory valuation reserves 900,000     900,000   300,000
Sales, general and administrative 14,438,000   $ 18,394,000 $ 33,422,000 $ 34,450,000  
Product return period       15 days    
Valuation allowances and reserves, amount 24,000     $ 24,000   36,000
Product shelf life       5 years    
Estimated useful lives       50 years    
Number of reportable segments | segment       1    
Number of reporting units | reportingunit       1    
Goodwill and intangible asset impairment 0         0
Asset impairment charges       $ 0   0
Foreign currency transaction gain (loss)       $ (5,800,000) (300,000)  
Minimum            
Summary Of Significant Accounting Policies [Line Items]            
Estimated useful lives       5 years    
Estimated useful lives       2 years    
Maximum            
Summary Of Significant Accounting Policies [Line Items]            
Estimated useful lives       10 years    
Estimated useful lives       15 years    
Shipping and Handling            
Summary Of Significant Accounting Policies [Line Items]            
Sales, general and administrative 600,000   $ 700,000 $ 1,400,000 1,400,000  
Product Concentration Risk | NuSil Technology LLC            
Summary Of Significant Accounting Policies [Line Items]            
Purchases from suppliers       8,100,000 $ 8,100,000  
Outstanding balance owed $ 2,000,000.0     $ 2,000,000.0   $ 2,700,000
Revenue | Geographic Concentration Risk | Brazil            
Summary Of Significant Accounting Policies [Line Items]            
Concentration risk (as a percent)       9.60% 16.10%  
Purchases | Product Concentration Risk            
Summary Of Significant Accounting Policies [Line Items]            
Concentration risk (as a percent)       67.40% 62.10%  
Customer One | Customer concentration risk            
Summary Of Significant Accounting Policies [Line Items]            
Concentration risk (as a percent)   10.20%   13.00%    
Customer Two | Customer concentration risk            
Summary Of Significant Accounting Policies [Line Items]            
Concentration risk (as a percent)       11.50%