Note 12 - Subsequent Events (Details Textual) - Subsequent Event [Member] - Lease Agreement for Research, Development, and Demonstration Space in Milan, Italy [Member] - Asensus Surgical Italia S.r.L. [Member] $ in Millions	1 Months Ended
	Oct. 31, 2021 USD ($)
Lessee, Operating Lease, Term of Contract (Month)	87 months
Lessee, Operating Lease, Option to Extend, Term (Year)	6 years
Lessee, Operating Lease, Payment of Quarterly Payments, Period Following Commencement (Month)	15 months
Lessee, Operating Lease, Period After which Lease is Subject to Annual Escalations (Year)	3 years
Operating Lease, Expense Expected Over Initial Lease Term	$ 1.7