Note 2 - Revenue Recognition - Transaction Price Allocated to the Remaining Performance Obligations (Details) (Parentheticals) - Edge to Cloud [Member]	Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Remaining Performance Obligation, Period (Year)	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Remaining Performance Obligation, Period (Year)	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Remaining Performance Obligation, Period (Year)	1 year