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Bank Financing Arrangements (Details Narrative) - USD ($)
 3 Months Ended 9 Months Ended
Mar. 20, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Remaining borrowing capacity   $ 2,186,000   $ 2,186,000  
Domestic Line of Credit          
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   $ 3,000
Line of credit expiration date Feb. 27, 2019        
Foreign Line of Credit          
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 Feb. 27, 2018