Related Party Transactions (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Payment to related party	$ 390,000	$ 1,413,000
Ross Dove and Kirk Dove [Member]
Related Party Transaction [Line Items]
Payment to related party	179,000
Street Capital Loan [Member]
Related Party Transaction [Line Items]
Payment to related party	$ 400,000
Lease Amounts [Member] | Senior Officer of NLEX [Member] | Edwardsville, IL [Member]
Related Party Transaction [Line Items]
Related party transaction agreement end date	May 31, 2023
Lease Amounts [Member] | Senior Officer of NLEX [Member] | Edwardsville, IL [Member] | Selling, General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
Payment to related party	$ 105,000	$ 100,000
Final Earn-out Provision Payment [Member] | David Ludwig [Member]
Related Party Transaction [Line Items]
Payment to related party	$ 2,600,000