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Note 14 - Commitments (Details Textual)
1 Months Ended 9 Months Ended
Jul. 10, 2017
USD ($)
Jan. 01, 2005
Aug. 31, 2019
USD ($)
Jun. 30, 2015
USD ($)
ft²
Sep. 30, 2021
USD ($)
Mar. 02, 2021
Mar. 01, 2021
Dec. 31, 2020
USD ($)
Advances on Inventory Purchases         $ 1,509,530     $ 414,202
Operating Lease, Right-of-Use Asset         571,678     632,453
Operating Lease, Liability, Total         576,408     630,012
Operating Lease, Liability, Current         78,476     72,031
Operating Lease, Liability, Noncurrent         497,932     557,981
Finance Lease, Liability, Total         30,624     36,403
Finance Lease, Liability, Current         8,351     7,796
Finance Lease, Liability, Noncurrent         $ 22,273     $ 28,607
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%            
Previous President and Chief Executive Officer [Member]                
Increase (Decrease) in Deferred Compensation $ (100,000)              
Employment Agreement, Base Compensation 200,000              
Consultant [Member]                
Increase (Decrease) in Deferred Compensation (100,000)              
Employment Agreement, Base Compensation $ 200,000              
Interim Chief Executive Officer [Member]                
Royalty on Net Sales, Percentage           2.50%    
Director Clinical Affair [Member]                
Royalty on Net Sales, Percentage           2.50% 5.00%  
Office Lease for Headquarter in Livingston, New Jersey [Member]                
Area of Rentable Space (Square Foot) | ft²       774        
Operating Leases, Monthly Rent Expense       $ 12,522        
Lessee, Operating Lease, Electric Charge Per Square Foot     $ 2.00          
Lessee, Operating Lease, Electric Payments, Annually     11,130          
Office Lease for Headquarter in Livingston, New Jersey [Member] | Minimum [Member]                
Operating Leases, Monthly Rent Expense     9,275          
Office Lease for Headquarter in Livingston, New Jersey [Member] | Maximum [Member]                
Operating Leases, Monthly Rent Expense     $ 10,898          
Purchase Commitment for Devices [Member]                
Purchase Commitment Number Of Units         2,000      
Purchase Commitment, Remaining Minimum Amount Committed         $ 2,900,000      
Advances on Inventory Purchases         1,500,000      
Purchase Commitment For Devices Beginning In 2021 [Member]                
Purchase Commitment, Remaining Minimum Amount Committed         98,902      
Advances on Inventory Purchases         $ 38,257