Note 14 - Commitments (Details Textual)		1 Months Ended				3 Months Ended
	Jan. 01, 2005	Feb. 28, 2021	Jan. 31, 2021	Aug. 31, 2019 USD ($)	Jun. 30, 2015 USD ($) ft²	Mar. 31, 2021 USD ($)	Mar. 02, 2021	Mar. 01, 2021	Dec. 31, 2020 USD ($)
Advances on Inventory Purchases						$ 753,197			$ 414,202
Operating Lease, Right-of-Use Asset						579,990			597,770
Operating Lease, Liability, Total						612,016			630,012
Operating Lease, Liability, Current						73,596			72,031
Operating Lease, Liability, Noncurrent						538,421			557,981
Finance Lease, Liability, Total						34,521			36,403
Finance Lease, Liability, Current						7,977			7,796
Finance Lease, Liability, Noncurrent						26,544			$ 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%
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, 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			2,000
Purchase Commitment, Remaining Minimum Amount Committed						1,500,000
Advances on Inventory Purchases						$ 504,000
Purchase Commitment for Devices Begining in 2020 [Member]
Purchase Commitment Number Of Units						100
Purchase Commitment, Remaining Minimum Amount Committed						$ 102,000
Advances on Inventory Purchases						54,000
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		246
Purchase Commitment, Remaining Minimum Amount Committed						58,000
Advances on Inventory Purchases						$ 44,000