Related Party Transactions (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Payment to related party	$ 0	$ 390,000
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	$ 108,000	105,000
Ross Dove and Kirk Dove [Member]
Related Party Transaction [Line Items]
Payment to related party		179,000
David Ludwig [Member] | Final Earn-out Provision Payment [Member]
Related Party Transaction [Line Items]
Payment to related party		$ 2,600,000