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Note 14 - Commitments (Details Textual) |  |  | 1 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 10, 2017 USD ($) | Jan. 01, 2005 | Feb. 28, 2021 | Aug. 31, 2019 USD ($) | Jun. 30, 2015 USD ($) ft² | Jun. 30, 2021 USD ($) | Mar. 31, 2021 USD ($) | Mar. 02, 2021 | Mar. 01, 2021 | Dec. 31, 2020 USD ($)
Advances on Inventory Purchases |  |  |  |  |  | $ 1,393,817 |  |  |  | $ 414,202
Operating Lease, Right-of-Use Asset |  |  |  |  |  |  | $ 593,049 |  |  | 597,770
Operating Lease, Liability, Total |  |  |  |  |  |  | 594,416 |  |  | 630,012
Operating Lease, Liability, Current |  |  |  |  |  | 76,008 | 76,008 |  |  | 72,031
Operating Lease, Liability, Noncurrent |  |  |  |  |  | 518,408 | 518,408 |  |  | 557,981
Finance Lease, Liability, Total |  |  |  |  |  |  | 32,595 |  |  | 36,403
Finance Lease, Liability, Current |  |  |  |  |  | 8,162 | 8,162 |  |  | 7,796
Finance Lease, Liability, Noncurrent |  |  |  |  |  | $ 24,433 | $ 24,433 |  |  | $ 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 |  |  |  |  |  | 1,000,000 |  |  |  |
Purchase Commitment For Devices Beginning In 2021 [Member] |  |  |  |  |  |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  |  | 328,000 |  |  |  |
Advances on Inventory Purchases |  |  |  |  |  | 150,000 |  |  |  |
Purchase Commitment For Epidural Disposable Kits Beginning In April 2021 [Member] |  |  |  |  |  |  |  |  |  |
Purchase Commitment Number Of Units |  |  | 1,185 |  |  |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  |  |  | 197,000 |  |  |  |
Advances on Inventory Purchases |  |  |  |  |  | $ 172,000 |  |  |  |

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