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Note 13 - Commitments (Details Textual) |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Jan. 01, 2005 | Aug. 31, 2019 USD ($) | Jul. 31, 2019 | Jun. 30, 2015 USD ($) ft² | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($)
Advances on Inventory Purchases |  |  |  |  | $ 775,833 |  | $ 710,662
Operating Leases, Monthly Rent Expense |  |  |  | $ 12,522 |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  | 649,425 |  | 15,924
Operating Lease, Liability, Total |  |  |  |  | 677,052 |  |
Operating Lease, Liability, Current |  |  |  |  | 65,034 |  | 15,924
Operating Lease, Liability, Noncurrent |  |  |  |  | 612,018 |  |
Finance Lease, Liability, Total |  |  |  |  | 43,242 |  |
Finance Lease, Liability, Total |  |  |  |  | 41,800 |  |
Finance Lease, Liability, Current |  |  |  |  | 7,279 |  |
Finance Lease, Liability, Noncurrent |  |  |  |  | 34,521 |  |
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% |  |  |  |  |  |
Director Clinical Affair [Member] |  |  |  |  |  |  |
Royalty Expense |  |  |  |  | $ 95,000 | $ 91,490 |
Copiers Lease Agreement [Member] |  |  |  |  |  |  |
Lessee, Finance Lease, Term of Contract (Year) |  |  |  |  | 5 years |  |
Finance Lease, Liability, Total |  |  |  |  | $ 43,242 |  |
Office Lease for Headquarter in Livingston, New Jersey [Member] |  |  |  |  |  |  |
Area of Rentable Space (Square Foot) | ft² |  |  |  | 774 |  |  |
Lessee, Operating Lease, Term of Contract (Year) |  | 7 years |  |  |  |  |
Lessee, Operating Lease, Electric Charge Per Square Foot |  | $ 2 |  |  |  |  |
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 |  |  | 1,400 |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  | 736,120 |  |
Advances on Inventory Purchases |  |  |  |  | $ 313,766 |  |
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 |  |  |  |  | 149,500 |  |
Purchase Commitment For Devices Beginning In 2021 [Member] |  |  |  |  |  |  |
Advances on Inventory Purchases |  |  |  |  | $ 121,649 |  |

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