Note 12 - Commitments (Details Textual)	3 Months Ended
	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Advances on Inventory Purchases	$ 943,740	$ 1,275,260
Purchase Commitment for Devices [Member]
Purchase Commitment Number Of Units	2,200
Purchase Commitment, Remaining Minimum Amount Committed	$ 2,600,000	3,200,000
Advances on Inventory Purchases	604,000	932,000
Development of the Next Generation Instrument [Member]
Purchase Commitment, Remaining Minimum Amount Committed	292,000
Contracts for Funding of Future Epidural Instruments and Parts [Member]
Advances on Inventory Purchases	$ 44,000	$ 168,000