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Note 13 - Commitments (Details Textual) |  |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Feb. 25, 2021 | Jan. 01, 2005 | Aug. 31, 2019 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Advances on Inventory Purchases |  |  |  | $ 1,217,253 | $ 1,309,260
Lease, Right-of-Use Asset |  |  |  | 528,907 | 550,511
Lease, Liability |  |  |  | 538,441 | 577,981
Lease, Liability, Current |  |  |  | 83,585 | 81,001
Lease, Liability, Noncurrent |  |  |  | 454,857 | 476,980
Finance Lease, Liability, Total |  |  |  | 26,544 | 28,607
Finance Lease, Liability, Current |  |  |  | 8,743 | 8,545
Finance Lease, Liability, Noncurrent |  |  |  | $ 17,801 | 20,062
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 | 2.50% | 5.00% |  |  |
Office Lease for Headquarter in Livingston, New Jersey [Member] |  |  |  |  |
Lessee, Operating Lease, Term of Contract (Year) |  |  | 7 years |  |
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 |  |  |  | 3,300 |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  | $ 2,500,000 | 2,600,000
Advances on Inventory Purchases |  |  |  | 1,100,000 | 1,300,000
Purchase Commitment For Epidural Instrument [Member] |  |  |  |  |
Purchase Commitment, Remaining Minimum Amount Committed |  |  |  | 34,000 | 34,000
Advances on Inventory Purchases |  |  |  | $ 1,200,000 | $ 1,300,000

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