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Bank Financing Arrangements March 20, 2017 (Details Narrative) - USD ($)
 12 Months Ended
Mar. 20, 2017
Dec. 31, 2017
Dec. 31, 2016
Remaining borrowing capacity   $ 1,583,000  
Domestic Line of Credit-March 20, 2017      
Aggregate maximum advance amount $ 2,000,000    
Borrowing capacity description 70% of qualified receivables    
Debt reference rate Bank's Prime Rate    
Minimum interest rate on debt (as a percent) 3.25%    
Basis point added to reference rate of debt 1.50%    
Monthly collateral handling fee 0.10%    
Interest expense   $ 0 $ 3,000
Line of credit expiration date Jan. 31, 2018    
Foreign Line of Credit-March 20, 2017      
Aggregate maximum advance amount $ 500,000    
Borrowing capacity description 70% of qualified receivables    
Debt reference rate Bank's Prime Rate    
Minimum interest rate on debt (as a percent) 3.25%    
Basis point added to reference rate of debt 1.50%    
Monthly collateral handling fee 0.10%    
Line of credit expiration date Jan. 31, 2018