Note 2 - Revenue Recognition - Transaction Price Allocated to the Remaining Performance Obligations 2 (Details) - Edge to Cloud [Member] $ in Thousands	Jun. 30, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Remaining Performance Obligation	$ (862,052)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Remaining Performance Obligation	(1,374,163)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Remaining Performance Obligation	$ (451,537)