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Note 13 - Commitments (Details Textual)
1 Months Ended 9 Months Ended
Jan. 01, 2005
Aug. 31, 2019
USD ($)
Jan. 31, 2018
Jun. 30, 2015
USD ($)
ft²
Sep. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Advances on Inventory Purchases         $ 628,494 $ 648,783
Operating Leases, Monthly Rent Expense       $ 12,522    
Additional Percentage of Director Compensation on Sales Value Using Certain Specify Technology 2.50%          
Additional Percentage of Director Compensation Sales Value Using Other Kind of Technology 5.00%          
Office Lease for Headquarter in Livingston, New Jersey [Member]            
Area of Real Estate Property | ft²       6,851    
Area of Rentable Space | ft²       774    
Operating Leases, Monthly Rent Expense   $ 9,275        
Lessee, Operating Lease, Term of Contract   7 years        
Lessee, Operating Lease, Electric Charge Per Square Foot   $ 2        
Lessee, Operating Lease, Electric Payments, Annually   11,130        
Lessee, Operating Lease, Electric Payments, Monthly   $ 927.50        
Purchase Commitment for Devices [Member]            
Purchase Commitment Number Of Units     1,000      
Purchase Commitment for Devices Begining in 2019 [Member]            
Purchase Commitment Number Of Units         1,500  
Purchase Commitment, Remaining Minimum Amount Committed         $ 1,149,560  
Advances on Inventory Purchases         $ 434,605  
Purchase Commitment for Devices Begining in 2020 [Member]            
Purchase Commitment Number Of Units   100     100  
Purchase Commitment, Remaining Minimum Amount Committed         $ 299,000  
Advances on Inventory Purchases         $ 89,700