Note 13 - Revenue - Summary of Remaining Performance Obligations 2 (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Rental Revenue [Member]
Service revenue, expected to be recognized in the future	$ 8,536
Rental Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Service revenue, expected to be recognized in the future	$ 3,901
Service revenue, expected to be recognized in the future, period (Year)	6 months
Rental Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Service revenue, expected to be recognized in the future	$ 3,735
Service revenue, expected to be recognized in the future, period (Year)	1 year
Rental Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Service revenue, expected to be recognized in the future	$ 900
Service revenue, expected to be recognized in the future, period (Year)	1 year
Service Revenue [Member]
Service revenue, expected to be recognized in the future	$ 349
Service Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Service revenue, expected to be recognized in the future	$ 151
Service revenue, expected to be recognized in the future, period (Year)	6 months
Service Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Service revenue, expected to be recognized in the future	$ 188
Service revenue, expected to be recognized in the future, period (Year)	1 year
Service Revenue [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Service revenue, expected to be recognized in the future	$ 10
Service revenue, expected to be recognized in the future, period (Year)	1 year