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Bank Financing Arrangements (Details Narrative) - USD ($)
 3 Months Ended 6 Months Ended
Jan. 31, 2018
Jun. 30, 2019
Jun. 30, 2019
Domestic Line of Credit      
Aggregate maximum advance amount $ 2,000,000    
Borrowing capacity description 80% of qualified receivables    
Debt reference rate U.S. Prime Rate    
Basis point added to reference rate of debt 0.75%    
Line of credit expiration date Jan. 31, 2020    
Foreign Line of Credit      
Aggregate maximum advance amount $ 500,000    
Borrowing capacity description 80% of qualified receivables    
Debt reference rate U.S. Prime Rate    
Basis point added to reference rate of debt 0.75%    
Line of credit expiration date Jan. 31, 2020    
Term Loan for Stock Repurchase      
Aggregate maximum advance amount $ 4,000,000    
Borrowing capacity description Payable over 48 months    
Debt reference rate U.S. Prime Rate    
Basis point added to reference rate of debt 1.75%    
Amount outstanding   $ 583,333 $ 583,333
Amount repaid   125,000 250,000
Interest expense   13,350 29,194
Line of Credit Facilities      
Amount outstanding   1,929,974 1,929,974
Amount borrowed     8,754,000
Amount repaid     8,240,804
Interest expense   15,984 28,677
Accrued interest payable   16,491 16,491
Remaining borrowing capacity   $ 194,000 $ 194,000