Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment, Estimated Useful Life (Details)	Sep. 30, 2023
Rental Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful lives (Year)	2 years
Rental Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful lives (Year)	5 years
Machinery and Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful lives (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful lives (Year)	15 years
Building and Building Improvements [Member] | Minimum [Member]
Property, plant and equipment, useful lives (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Property, plant and equipment, useful lives (Year)	50 years
Property, Plant and Equipment, Other Types [Member] | Minimum [Member]
Property, plant and equipment, useful lives (Year)	5 years
Property, Plant and Equipment, Other Types [Member] | Maximum [Member]
Property, plant and equipment, useful lives (Year)	10 years