Note 4 - Business Combinations - Estimate Fair Value of the Identifiable Assets Acquired and Estimated Useful Lives (Details) - USD ($) $ in Thousands	Jun. 07, 2021	Oct. 02, 2020	Jun. 07, 2020
Zonehaven, Inc [Member]
Fair value	$ 10,100
Useful lives (Year)	6 years 8 months 12 days
Zonehaven, Inc [Member] | Developed Technology Rights [Member]
Fair value	$ 8,800
Useful lives (Year)	7 years
Zonehaven, Inc [Member] | Trade Names [Member]
Fair value	$ 400
Useful lives (Year)	5 years
Zonehaven, Inc [Member] | Customer Relationships [Member]
Fair value	$ 900
Useful lives (Year)	5 years
Assets Acquisition of Amika Mobile Corporation [Member]
Fair value		$ 2,820	$ 10,100
Useful lives (Year)		7 years
Assets Acquisition of Amika Mobile Corporation [Member] | Developed Technology Rights [Member]
Fair value		$ 2,500
Useful lives (Year)		7 years
Assets Acquisition of Amika Mobile Corporation [Member] | Customer Relationships [Member]
Fair value		$ 320
Useful lives (Year)		7 years