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Note P - Concentration (Details Textual)
1 Months Ended 12 Months Ended
Jan. 31, 2017
Mar. 31, 2016
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Advances on Inventory Purchases     $ 697,192 $ 700,900
Accounts Receivable, Gross     $ 2,555,476 $ 2,994,686
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member]        
Number of Customers     2 2
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Two Customers [Member]        
Concentration Risk, Percentage     70.00% 58.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Customer One [Member]        
Concentration Risk, Percentage     51.00% 31.00%
Sales Revenue, Goods, Net [Member] | Customer Concentration Risk [Member] | Customer Two [Member]        
Concentration Risk, Percentage     19.00% 27.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]        
Concentration Risk, Percentage     78.00% 85.00%
Instruments [Member]        
Purchase Commitment Number Of Units 2,000 3,000    
Advances on Inventory Purchases     $ 697,192 $ 656,752
Purchase Commitment, Remaining Minimum Amount Committed     $ 300,460 $ 272,231