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Debt (Details Narrative 1) - USD ($)
3 Months Ended 6 Months Ended
Nov. 10, 2016
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Loan Amendment and Assumption Agreement [Member]            
Debt Instrument [Line Items]            
Frequency of periodic payment Monthly          
Periodic payment $ 15,411          
Building Loan [Member]            
Debt Instrument [Line Items]            
Debt amount   $ 2,299,000   $ 2,299,000   $ 2,347,000
Effective interest rate   3.75%   3.75%   3.75%
Interest expense   $ 22,000 $ 23,000 $ 44,000 $ 46,000  
USC Working Capital Loan [Member]            
Debt Instrument [Line Items]            
Debt amount   0   0   $ 0
Interest expense   0 7,000 0 29,000  
Borrowing capacity under loan   $ 2,500,000   $ 2,500,000    
Borrowing base - trade account receivables   80.00%   80.00%    
Borrowing base - inventories   50.00%   50.00%    
Cash flow coverage ratio   120.00%   120.00%    
Quarterly prinicipal payment option       $ 250,000    
Equipment Loan - Tribune [Member]            
Debt Instrument [Line Items]            
Debt amount   $ 518,000   $ 518,000    
Interest rate   4.75%   4.75%    
USC Equipment Loan [Member]            
Debt Instrument [Line Items]            
Debt amount   $ 635,000   $ 635,000    
Interest rate   3.25%   3.25%    
Borrowing capacity under loan   $ 700,000   $ 700,000    
Consolidated Equipment Loans [Member]            
Debt Instrument [Line Items]            
Periodic payment       33,940    
Debt amount $ 1,152,890 529,000   529,000   $ 720,000
Interest rate 3.75%          
Interest expense   $ 6,000 $ 9,000 $ 12,000 $ 19,000