Note 11 - Commitments (Details Textual)	9 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Advances on Inventory Purchases	$ 1,011,306	$ 1,371,548
Purchase Commitment for Devices [Member]
Purchase Commitment Number Of Units	1,000
Purchase Commitment, Remaining Minimum Amount Committed	$ 1,000,000	2,300,000
Advances on Inventory Purchases	547,000	1,300,000
Development of the Next Generation Instrument [Member]
Purchase Commitment, Remaining Minimum Amount Committed	158,800
Contracts for Funding of Future Epidural Instruments and Parts [Member]
Advances on Inventory Purchases	$ 168,000	$ 41,000