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Related Party Transactions (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Related Party Transaction [Line Items]      
Common Stock, Shares, Issued 35,647,477   35,281,183
West Separation Agreement [Member]      
Related Party Transaction [Line Items]      
Due to Employees $ 200,000,000    
Payment To Related Party For Offset Health Coverage Cost $ 775,000    
Common Stock, Shares, Issued 25,000    
Senior Officer of NLEX [Member] | Lease Amounts [Member] | Edwardsville, IL [Member]      
Related Party Transaction [Line Items]      
Related party transaction agreement end date May 31, 2023    
Senior Officer of NLEX [Member] | Lease Amounts [Member] | Edwardsville, IL [Member] | Selling, General and Administrative Expenses [Member]      
Related Party Transaction [Line Items]      
Payment to related party $ 28,000 $ 27,000